/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy11.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:30:48,417 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:30:48,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:30:48,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:30:48,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:30:48,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:30:48,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:30:48,531 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:30:48,532 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:30:48,535 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:30:48,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:30:48,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:30:48,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:30:48,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:30:48,538 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:30:48,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:30:48,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:30:48,539 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:30:48,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:30:48,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:30:48,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:30:48,540 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:30:48,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:30:48,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:30:48,541 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:30:48,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:30:48,541 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:30:48,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:30:48,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:30:48,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:30:48,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:30:48,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:30:48,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:30:48,545 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:30:48,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:30:48,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:30:48,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:30:48,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:30:48,774 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:30:48,775 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:30:48,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy11.wvr_bound2.c [2023-08-04 03:30:49,946 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:30:50,116 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:30:50,117 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy11.wvr_bound2.c [2023-08-04 03:30:50,123 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb83b2c6/25773fe8edb041dcb9c9be49a92ffc7d/FLAG60a572462 [2023-08-04 03:30:50,134 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb83b2c6/25773fe8edb041dcb9c9be49a92ffc7d [2023-08-04 03:30:50,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:30:50,137 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:30:50,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:30:50,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:30:50,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:30:50,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75335be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50, skipping insertion in model container [2023-08-04 03:30:50,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,164 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:30:50,322 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-easy11.wvr_bound2.c[2167,2180] [2023-08-04 03:30:50,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:30:50,330 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:30:50,349 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-easy11.wvr_bound2.c[2167,2180] [2023-08-04 03:30:50,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:30:50,356 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:30:50,356 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:30:50,364 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:30:50,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50 WrapperNode [2023-08-04 03:30:50,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:30:50,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:30:50,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:30:50,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:30:50,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,381 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,396 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2023-08-04 03:30:50,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:30:50,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:30:50,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:30:50,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:30:50,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,411 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:30:50,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:30:50,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:30:50,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:30:50,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (1/1) ... [2023-08-04 03:30:50,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:30:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:50,447 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 03:30:50,462 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 03:30:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:30:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:30:50,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:30:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:30:50,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:30:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:30:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:30:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:30:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:30:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:30:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:30:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:30:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:30:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:30:50,491 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 03:30:50,596 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:30:50,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:30:50,826 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:30:50,833 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:30:50,833 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 03:30:50,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:30:50 BoogieIcfgContainer [2023-08-04 03:30:50,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:30:50,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:30:50,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:30:50,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:30:50,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:30:50" (1/3) ... [2023-08-04 03:30:50,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b6fae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:30:50, skipping insertion in model container [2023-08-04 03:30:50,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:50" (2/3) ... [2023-08-04 03:30:50,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b6fae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:30:50, skipping insertion in model container [2023-08-04 03:30:50,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:30:50" (3/3) ... [2023-08-04 03:30:50,841 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy11.wvr_bound2.c [2023-08-04 03:30:50,851 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:30:50,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:30:50,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:30:50,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:30:50,943 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:30:50,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 03:30:51,073 INFO L124 PetriNetUnfolderBase]: 33/252 cut-off events. [2023-08-04 03:30:51,073 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:30:51,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 252 events. 33/252 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 882 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2023-08-04 03:30:51,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 03:30:51,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 111 transitions, 244 flow [2023-08-04 03:30:51,088 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:30:51,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-04 03:30:51,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-04 03:30:51,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 03:30:51,162 INFO L124 PetriNetUnfolderBase]: 33/252 cut-off events. [2023-08-04 03:30:51,163 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:30:51,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 252 events. 33/252 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 882 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2023-08-04 03:30:51,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 03:30:53,128 INFO L134 LiptonReduction]: Checked pairs total: 2946 [2023-08-04 03:30:53,128 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-04 03:30:53,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:30:53,146 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;@6bbb6f68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:30:53,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:30:53,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:30:53,152 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-04 03:30:53,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:30:53,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:53,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:30:53,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:30:53,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash -233473453, now seen corresponding path program 1 times [2023-08-04 03:30:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:53,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216284593] [2023-08-04 03:30:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:30:53,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:30:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:30:53,282 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:30:53,284 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:30:53,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:30:53,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:30:53,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:30:53,287 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:30:53,289 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:30:53,290 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:30:53,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:30:53,310 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:30:53,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:53,420 INFO L124 PetriNetUnfolderBase]: 134/832 cut-off events. [2023-08-04 03:30:53,420 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:30:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 832 events. 134/832 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4375 event pairs, 2 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 490. Up to 32 conditions per place. [2023-08-04 03:30:53,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:53,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:53,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:30:53,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:53,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:53,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:53,504 INFO L124 PetriNetUnfolderBase]: 134/832 cut-off events. [2023-08-04 03:30:53,504 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:30:53,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 832 events. 134/832 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4375 event pairs, 2 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 490. Up to 32 conditions per place. [2023-08-04 03:30:53,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 03:30:55,348 INFO L134 LiptonReduction]: Checked pairs total: 8938 [2023-08-04 03:30:55,348 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-04 03:30:55,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:30:55,351 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;@6bbb6f68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:30:55,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:30:55,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:30:55,357 INFO L124 PetriNetUnfolderBase]: 7/67 cut-off events. [2023-08-04 03:30:55,358 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:30:55,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:55,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:30:55,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:30:55,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:55,359 INFO L85 PathProgramCache]: Analyzing trace with hash 66820544, now seen corresponding path program 1 times [2023-08-04 03:30:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607756169] [2023-08-04 03:30:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:30:55,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:55,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607756169] [2023-08-04 03:30:55,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607756169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:55,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102117568] [2023-08-04 03:30:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:55,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:55,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:55,497 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 03:30:55,520 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 03:30:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:55,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:30:55,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:30:55,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:30:55,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102117568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:55,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:30:55,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:30:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452490470] [2023-08-04 03:30:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:55,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:30:55,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:55,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:30:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:30:55,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-04 03:30:55,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:55,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:55,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-04 03:30:55,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:56,439 INFO L124 PetriNetUnfolderBase]: 6703/9301 cut-off events. [2023-08-04 03:30:56,439 INFO L125 PetriNetUnfolderBase]: For 959/959 co-relation queries the response was YES. [2023-08-04 03:30:56,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18907 conditions, 9301 events. 6703/9301 cut-off events. For 959/959 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 42567 event pairs, 2027 based on Foata normal form. 0/6486 useless extension candidates. Maximal degree in co-relation 5749. Up to 8817 conditions per place. [2023-08-04 03:30:56,465 INFO L140 encePairwiseOnDemand]: 246/251 looper letters, 30 selfloop transitions, 5 changer transitions 17/55 dead transitions. [2023-08-04 03:30:56,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 254 flow [2023-08-04 03:30:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:30:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:30:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-04 03:30:56,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48366533864541833 [2023-08-04 03:30:56,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-04 03:30:56,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-04 03:30:56,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:56,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-04 03:30:56,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,503 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,505 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 5 states and 607 transitions. [2023-08-04 03:30:56,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 254 flow [2023-08-04 03:30:56,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:30:56,516 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 91 flow [2023-08-04 03:30:56,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 03:30:56,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-04 03:30:56,521 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 91 flow [2023-08-04 03:30:56,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:56,522 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:30:56,529 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 03:30:56,726 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 03:30:56,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:30:56,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1039868316, now seen corresponding path program 1 times [2023-08-04 03:30:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:56,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286129603] [2023-08-04 03:30:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:30:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286129603] [2023-08-04 03:30:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286129603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:56,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:30:56,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:30:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050236304] [2023-08-04 03:30:56,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:56,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:30:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:56,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:30:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:30:56,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 251 [2023-08-04 03:30:56,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:56,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 251 [2023-08-04 03:30:56,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:56,962 INFO L124 PetriNetUnfolderBase]: 1495/2068 cut-off events. [2023-08-04 03:30:56,962 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-04 03:30:56,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4296 conditions, 2068 events. 1495/2068 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7435 event pairs, 642 based on Foata normal form. 1/1536 useless extension candidates. Maximal degree in co-relation 1363. Up to 1975 conditions per place. [2023-08-04 03:30:56,973 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 26 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-04 03:30:56,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 152 flow [2023-08-04 03:30:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:30:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:30:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-04 03:30:56,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48339973439575035 [2023-08-04 03:30:56,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-04 03:30:56,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-04 03:30:56,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:56,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-04 03:30:56,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,980 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 91 flow. Second operand 3 states and 364 transitions. [2023-08-04 03:30:56,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 152 flow [2023-08-04 03:30:56,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 149 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:30:56,983 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 87 flow [2023-08-04 03:30:56,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-04 03:30:56,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-04 03:30:56,984 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 87 flow [2023-08-04 03:30:56,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:56,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:56,984 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:56,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:30:56,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:30:56,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2015593482, now seen corresponding path program 1 times [2023-08-04 03:30:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:56,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925954652] [2023-08-04 03:30:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:56,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:30:57,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925954652] [2023-08-04 03:30:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925954652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874937229] [2023-08-04 03:30:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:57,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:57,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:57,081 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 03:30:57,109 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 03:30:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:57,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:30:57,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:30:57,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:30:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:30:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874937229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:30:57,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:30:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:30:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78587003] [2023-08-04 03:30:57,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:30:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:30:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:30:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:30:57,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-04 03:30:57,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:57,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-04 03:30:57,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:57,304 INFO L124 PetriNetUnfolderBase]: 1216/1654 cut-off events. [2023-08-04 03:30:57,304 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 03:30:57,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3412 conditions, 1654 events. 1216/1654 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5427 event pairs, 306 based on Foata normal form. 3/1225 useless extension candidates. Maximal degree in co-relation 1369. Up to 1549 conditions per place. [2023-08-04 03:30:57,313 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 30 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-04 03:30:57,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 170 flow [2023-08-04 03:30:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:30:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:30:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2023-08-04 03:30:57,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4760956175298805 [2023-08-04 03:30:57,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2023-08-04 03:30:57,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2023-08-04 03:30:57,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:57,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2023-08-04 03:30:57,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,319 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 87 flow. Second operand 4 states and 478 transitions. [2023-08-04 03:30:57,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 170 flow [2023-08-04 03:30:57,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:30:57,322 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 84 flow [2023-08-04 03:30:57,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-04 03:30:57,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-04 03:30:57,324 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 84 flow [2023-08-04 03:30:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:57,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:57,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:30:57,533 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,SelfDestructingSolverStorable3 [2023-08-04 03:30:57,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:30:57,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash -732765457, now seen corresponding path program 1 times [2023-08-04 03:30:57,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:57,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697358186] [2023-08-04 03:30:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:57,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:30:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697358186] [2023-08-04 03:30:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697358186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:57,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781351835] [2023-08-04 03:30:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:57,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:57,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:57,636 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 03:30:57,639 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 03:30:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:57,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:30:57,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:30:57,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:30:57,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781351835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:57,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:30:57,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:30:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830563084] [2023-08-04 03:30:57,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:57,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:30:57,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:30:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:30:57,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-04 03:30:57,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:57,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-04 03:30:57,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:57,846 INFO L124 PetriNetUnfolderBase]: 892/1222 cut-off events. [2023-08-04 03:30:57,846 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-08-04 03:30:57,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2557 conditions, 1222 events. 892/1222 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3693 event pairs, 22 based on Foata normal form. 81/979 useless extension candidates. Maximal degree in co-relation 1015. Up to 567 conditions per place. [2023-08-04 03:30:57,849 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-04 03:30:57,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 242 flow [2023-08-04 03:30:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:30:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:30:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-04 03:30:57,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48366533864541833 [2023-08-04 03:30:57,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-04 03:30:57,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-04 03:30:57,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:57,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-04 03:30:57,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,855 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,856 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 84 flow. Second operand 5 states and 607 transitions. [2023-08-04 03:30:57,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 242 flow [2023-08-04 03:30:57,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 235 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:30:57,857 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-04 03:30:57,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-04 03:30:57,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-04 03:30:57,858 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-04 03:30:57,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:57,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:30:57,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:30:57,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:30:58,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:58,063 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:30:58,064 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:30:58,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:58,114 INFO L124 PetriNetUnfolderBase]: 134/832 cut-off events. [2023-08-04 03:30:58,115 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:30:58,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 832 events. 134/832 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4375 event pairs, 2 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 490. Up to 32 conditions per place. [2023-08-04 03:30:58,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:58,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:58,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:30:58,121 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:58,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:58,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 326 flow [2023-08-04 03:30:58,170 INFO L124 PetriNetUnfolderBase]: 134/832 cut-off events. [2023-08-04 03:30:58,171 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:30:58,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 832 events. 134/832 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4375 event pairs, 2 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 490. Up to 32 conditions per place. [2023-08-04 03:30:58,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 03:31:00,227 INFO L134 LiptonReduction]: Checked pairs total: 8938 [2023-08-04 03:31:00,227 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-04 03:31:00,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:31:00,229 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;@6bbb6f68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:31:00,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:31:00,231 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:31:00,231 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 03:31:00,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:31:00,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:00,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 03:31:00,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:00,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash 778098181, now seen corresponding path program 1 times [2023-08-04 03:31:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:00,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886123320] [2023-08-04 03:31:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:00,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:00,269 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 03:31:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886123320] [2023-08-04 03:31:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886123320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:31:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:31:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508915015] [2023-08-04 03:31:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:31:00,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 249 [2023-08-04 03:31:00,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:00,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:00,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 249 [2023-08-04 03:31:00,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:00,718 INFO L124 PetriNetUnfolderBase]: 6653/9167 cut-off events. [2023-08-04 03:31:00,718 INFO L125 PetriNetUnfolderBase]: For 1030/1030 co-relation queries the response was YES. [2023-08-04 03:31:00,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18683 conditions, 9167 events. 6653/9167 cut-off events. For 1030/1030 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 40677 event pairs, 3024 based on Foata normal form. 0/6369 useless extension candidates. Maximal degree in co-relation 5724. Up to 8772 conditions per place. [2023-08-04 03:31:00,772 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 40 selfloop transitions, 2 changer transitions 2/48 dead transitions. [2023-08-04 03:31:00,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 228 flow [2023-08-04 03:31:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-04 03:31:00,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087014725568942 [2023-08-04 03:31:00,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-04 03:31:00,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-04 03:31:00,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:00,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-04 03:31:00,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:00,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:00,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:00,777 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 380 transitions. [2023-08-04 03:31:00,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 228 flow [2023-08-04 03:31:00,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:31:00,781 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 134 flow [2023-08-04 03:31:00,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-04 03:31:00,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 03:31:00,783 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 134 flow [2023-08-04 03:31:00,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:00,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:00,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:00,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:31:00,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:00,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash -666032979, now seen corresponding path program 1 times [2023-08-04 03:31:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:00,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627745638] [2023-08-04 03:31:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:00,822 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 03:31:00,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627745638] [2023-08-04 03:31:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627745638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706350895] [2023-08-04 03:31:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:00,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:00,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:00,824 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 03:31:00,853 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 03:31:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:00,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:00,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:00,897 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 03:31:00,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706350895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:00,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:00,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:31:00,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673725134] [2023-08-04 03:31:00,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:00,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 249 [2023-08-04 03:31:00,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:00,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:00,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 249 [2023-08-04 03:31:00,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:01,402 INFO L124 PetriNetUnfolderBase]: 6641/9167 cut-off events. [2023-08-04 03:31:01,402 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-04 03:31:01,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18623 conditions, 9167 events. 6641/9167 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 40532 event pairs, 3020 based on Foata normal form. 0/6396 useless extension candidates. Maximal degree in co-relation 18587. Up to 8589 conditions per place. [2023-08-04 03:31:01,434 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 47 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 03:31:01,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 254 flow [2023-08-04 03:31:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-04 03:31:01,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153949129852744 [2023-08-04 03:31:01,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-04 03:31:01,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-04 03:31:01,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:01,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-04 03:31:01,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:01,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:01,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:01,441 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 134 flow. Second operand 3 states and 385 transitions. [2023-08-04 03:31:01,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 254 flow [2023-08-04 03:31:01,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:31:01,445 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 138 flow [2023-08-04 03:31:01,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-04 03:31:01,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 03:31:01,447 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 138 flow [2023-08-04 03:31:01,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:01,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:01,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:01,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 03:31:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:01,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:01,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -272673411, now seen corresponding path program 1 times [2023-08-04 03:31:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46732824] [2023-08-04 03:31:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:01,687 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 03:31:01,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46732824] [2023-08-04 03:31:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46732824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768856968] [2023-08-04 03:31:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:01,689 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 03:31:01,712 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 03:31:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:01,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:01,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:01,755 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 03:31:01,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:01,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768856968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:01,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:01,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:31:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15080275] [2023-08-04 03:31:01,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:01,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 249 [2023-08-04 03:31:01,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:01,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:01,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 249 [2023-08-04 03:31:01,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:02,152 INFO L124 PetriNetUnfolderBase]: 5690/7982 cut-off events. [2023-08-04 03:31:02,153 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-08-04 03:31:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16560 conditions, 7982 events. 5690/7982 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 35277 event pairs, 2614 based on Foata normal form. 0/5794 useless extension candidates. Maximal degree in co-relation 5708. Up to 5757 conditions per place. [2023-08-04 03:31:02,185 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 55 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 03:31:02,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 298 flow [2023-08-04 03:31:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-04 03:31:02,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247657295850067 [2023-08-04 03:31:02,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-04 03:31:02,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-04 03:31:02,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:02,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-04 03:31:02,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,189 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 138 flow. Second operand 3 states and 392 transitions. [2023-08-04 03:31:02,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 298 flow [2023-08-04 03:31:02,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:02,192 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 148 flow [2023-08-04 03:31:02,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 03:31:02,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 03:31:02,193 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 148 flow [2023-08-04 03:31:02,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:02,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:02,205 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 03:31:02,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:02,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:02,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1686973413, now seen corresponding path program 1 times [2023-08-04 03:31:02,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:02,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762659123] [2023-08-04 03:31:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:02,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:02,450 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 03:31:02,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:02,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762659123] [2023-08-04 03:31:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762659123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329714771] [2023-08-04 03:31:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:02,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:02,452 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 03:31:02,486 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 03:31:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:02,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:02,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:02,530 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 03:31:02,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:02,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329714771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:02,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 03:31:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3626867] [2023-08-04 03:31:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:02,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:02,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 249 [2023-08-04 03:31:02,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:02,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 249 [2023-08-04 03:31:02,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:02,872 INFO L124 PetriNetUnfolderBase]: 5591/7935 cut-off events. [2023-08-04 03:31:02,872 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2023-08-04 03:31:02,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17162 conditions, 7935 events. 5591/7935 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 34925 event pairs, 2913 based on Foata normal form. 0/6054 useless extension candidates. Maximal degree in co-relation 6211. Up to 6075 conditions per place. [2023-08-04 03:31:02,898 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 56 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 03:31:02,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 310 flow [2023-08-04 03:31:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-04 03:31:02,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247657295850067 [2023-08-04 03:31:02,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-04 03:31:02,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-04 03:31:02,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:02,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-04 03:31:02,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,903 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 148 flow. Second operand 3 states and 392 transitions. [2023-08-04 03:31:02,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 310 flow [2023-08-04 03:31:02,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:02,909 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 158 flow [2023-08-04 03:31:02,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 03:31:02,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 03:31:02,909 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 158 flow [2023-08-04 03:31:02,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:02,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:02,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:02,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 03:31:03,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:03,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:03,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash -8711615, now seen corresponding path program 1 times [2023-08-04 03:31:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:03,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797450092] [2023-08-04 03:31:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:03,162 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 03:31:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:03,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797450092] [2023-08-04 03:31:03,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797450092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:03,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481397715] [2023-08-04 03:31:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:03,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:03,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:03,164 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 03:31:03,167 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 03:31:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:03,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:03,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:03,245 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 03:31:03,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:03,263 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 03:31:03,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481397715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:03,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:03,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:31:03,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440405694] [2023-08-04 03:31:03,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:03,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:03,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:03,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 249 [2023-08-04 03:31:03,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:03,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:03,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 249 [2023-08-04 03:31:03,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:03,591 INFO L124 PetriNetUnfolderBase]: 5039/7140 cut-off events. [2023-08-04 03:31:03,592 INFO L125 PetriNetUnfolderBase]: For 1189/1189 co-relation queries the response was YES. [2023-08-04 03:31:03,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15641 conditions, 7140 events. 5039/7140 cut-off events. For 1189/1189 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 30799 event pairs, 1564 based on Foata normal form. 3/5513 useless extension candidates. Maximal degree in co-relation 10534. Up to 6753 conditions per place. [2023-08-04 03:31:03,620 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 48 selfloop transitions, 3 changer transitions 1/56 dead transitions. [2023-08-04 03:31:03,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 284 flow [2023-08-04 03:31:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2023-08-04 03:31:03,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959839357429719 [2023-08-04 03:31:03,622 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2023-08-04 03:31:03,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2023-08-04 03:31:03,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:03,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2023-08-04 03:31:03,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:03,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:03,625 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:03,625 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 158 flow. Second operand 4 states and 494 transitions. [2023-08-04 03:31:03,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 284 flow [2023-08-04 03:31:03,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:03,639 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 170 flow [2023-08-04 03:31:03,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-04 03:31:03,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-04 03:31:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 170 flow [2023-08-04 03:31:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:03,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:03,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:03,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:03,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:03,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1124009750, now seen corresponding path program 1 times [2023-08-04 03:31:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:03,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517568335] [2023-08-04 03:31:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:31:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517568335] [2023-08-04 03:31:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517568335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038345973] [2023-08-04 03:31:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:03,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:03,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:03,889 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 03:31:03,891 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 03:31:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:03,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:03,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:31:03,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:31:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038345973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:03,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:31:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824373045] [2023-08-04 03:31:03,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:03,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 249 [2023-08-04 03:31:03,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:03,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:03,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 249 [2023-08-04 03:31:03,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:04,342 INFO L124 PetriNetUnfolderBase]: 4778/6762 cut-off events. [2023-08-04 03:31:04,343 INFO L125 PetriNetUnfolderBase]: For 729/729 co-relation queries the response was YES. [2023-08-04 03:31:04,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 6762 events. 4778/6762 cut-off events. For 729/729 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 28058 event pairs, 1398 based on Foata normal form. 27/5237 useless extension candidates. Maximal degree in co-relation 9733. Up to 5352 conditions per place. [2023-08-04 03:31:04,367 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 60 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2023-08-04 03:31:04,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 344 flow [2023-08-04 03:31:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-08-04 03:31:04,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080321285140562 [2023-08-04 03:31:04,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-08-04 03:31:04,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-08-04 03:31:04,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:04,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-08-04 03:31:04,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:04,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:04,376 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:04,377 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 170 flow. Second operand 4 states and 506 transitions. [2023-08-04 03:31:04,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 344 flow [2023-08-04 03:31:04,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 68 transitions, 335 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:31:04,393 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 175 flow [2023-08-04 03:31:04,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-04 03:31:04,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-04 03:31:04,394 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 175 flow [2023-08-04 03:31:04,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:04,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:04,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:04,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 03:31:04,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:04,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash 229748201, now seen corresponding path program 1 times [2023-08-04 03:31:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:04,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506732812] [2023-08-04 03:31:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:04,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:31:04,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506732812] [2023-08-04 03:31:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506732812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582641833] [2023-08-04 03:31:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:04,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:04,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:04,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:04,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:31:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:04,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:04,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:31:04,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:31:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582641833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:04,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:04,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:31:04,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809590257] [2023-08-04 03:31:04,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:04,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:04,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:04,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:04,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 249 [2023-08-04 03:31:04,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:04,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:04,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 249 [2023-08-04 03:31:04,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:05,027 INFO L124 PetriNetUnfolderBase]: 3272/4665 cut-off events. [2023-08-04 03:31:05,028 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 03:31:05,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10396 conditions, 4665 events. 3272/4665 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18012 event pairs, 855 based on Foata normal form. 108/3693 useless extension candidates. Maximal degree in co-relation 9164. Up to 1876 conditions per place. [2023-08-04 03:31:05,044 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 67 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-04 03:31:05,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 386 flow [2023-08-04 03:31:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-08-04 03:31:05,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150602409638554 [2023-08-04 03:31:05,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-08-04 03:31:05,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-08-04 03:31:05,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:05,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-08-04 03:31:05,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.25) internal successors, (513), 4 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 03:31:05,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:05,049 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:05,049 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 175 flow. Second operand 4 states and 513 transitions. [2023-08-04 03:31:05,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 386 flow [2023-08-04 03:31:05,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 376 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:31:05,055 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 186 flow [2023-08-04 03:31:05,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-04 03:31:05,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 03:31:05,056 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 186 flow [2023-08-04 03:31:05,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:05,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:05,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:05,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:05,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:05,262 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:05,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1145059746, now seen corresponding path program 1 times [2023-08-04 03:31:05,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:05,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328238353] [2023-08-04 03:31:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:05,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:31:05,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328238353] [2023-08-04 03:31:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328238353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380537207] [2023-08-04 03:31:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:05,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:05,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:05,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:05,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:31:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:05,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:05,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:31:05,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:31:05,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380537207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:05,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:05,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:31:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497647590] [2023-08-04 03:31:05,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:05,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 249 [2023-08-04 03:31:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 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 03:31:05,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 249 [2023-08-04 03:31:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:05,673 INFO L124 PetriNetUnfolderBase]: 3260/4642 cut-off events. [2023-08-04 03:31:05,673 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2023-08-04 03:31:05,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10886 conditions, 4642 events. 3260/4642 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17851 event pairs, 1969 based on Foata normal form. 13/3579 useless extension candidates. Maximal degree in co-relation 9656. Up to 3933 conditions per place. [2023-08-04 03:31:05,690 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 67 selfloop transitions, 3 changer transitions 2/76 dead transitions. [2023-08-04 03:31:05,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 398 flow [2023-08-04 03:31:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-08-04 03:31:05,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150602409638554 [2023-08-04 03:31:05,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-08-04 03:31:05,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-08-04 03:31:05,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:05,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-08-04 03:31:05,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.25) internal successors, (513), 4 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 03:31:05,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:05,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:05,696 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 186 flow. Second operand 4 states and 513 transitions. [2023-08-04 03:31:05,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 398 flow [2023-08-04 03:31:05,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:05,707 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 190 flow [2023-08-04 03:31:05,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-04 03:31:05,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 03:31:05,707 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 190 flow [2023-08-04 03:31:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 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 03:31:05,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:05,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:05,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 03:31:05,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:05,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1223144615, now seen corresponding path program 1 times [2023-08-04 03:31:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783125603] [2023-08-04 03:31:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:31:05,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:31:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:31:06,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:31:06,005 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:31:06,005 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:31:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 03:31:06,005 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:06,006 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 03:31:06,008 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 03:31:06,008 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 03:31:06,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 03:31:06 BasicIcfg [2023-08-04 03:31:06,086 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 03:31:06,086 INFO L158 Benchmark]: Toolchain (without parser) took 15949.51ms. Allocated memory was 727.7MB in the beginning and 1.2GB in the end (delta: 467.7MB). Free memory was 676.8MB in the beginning and 576.6MB in the end (delta: 100.3MB). Peak memory consumption was 569.0MB. Max. memory is 16.0GB. [2023-08-04 03:31:06,087 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 385.9MB. Free memory was 334.8MB in the beginning and 334.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 03:31:06,087 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.69ms. Allocated memory is still 727.7MB. Free memory was 676.8MB in the beginning and 665.7MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 03:31:06,087 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.70ms. Allocated memory is still 727.7MB. Free memory was 665.7MB in the beginning and 664.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:31:06,087 INFO L158 Benchmark]: Boogie Preprocessor took 20.77ms. Allocated memory is still 727.7MB. Free memory was 664.0MB in the beginning and 662.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:31:06,087 INFO L158 Benchmark]: RCFGBuilder took 415.85ms. Allocated memory is still 727.7MB. Free memory was 662.6MB in the beginning and 648.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 03:31:06,088 INFO L158 Benchmark]: TraceAbstraction took 15249.41ms. Allocated memory was 727.7MB in the beginning and 1.2GB in the end (delta: 467.7MB). Free memory was 648.2MB in the beginning and 576.6MB in the end (delta: 71.7MB). Peak memory consumption was 539.7MB. Max. memory is 16.0GB. [2023-08-04 03:31:06,093 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 385.9MB. Free memory was 334.8MB in the beginning and 334.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 226.69ms. Allocated memory is still 727.7MB. Free memory was 676.8MB in the beginning and 665.7MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.70ms. Allocated memory is still 727.7MB. Free memory was 665.7MB in the beginning and 664.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.77ms. Allocated memory is still 727.7MB. Free memory was 664.0MB in the beginning and 662.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 415.85ms. Allocated memory is still 727.7MB. Free memory was 662.6MB in the beginning and 648.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 15249.41ms. Allocated memory was 727.7MB in the beginning and 1.2GB in the end (delta: 467.7MB). Free memory was 648.2MB in the beginning and 576.6MB in the end (delta: 71.7MB). Peak memory consumption was 539.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 102 PlacesBefore, 29 PlacesAfterwards, 111 TransitionsBefore, 30 TransitionsAfterwards, 2662 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 93 TotalNumberOfCompositions, 2946 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2614, independent: 2592, independent conditional: 0, independent unconditional: 2592, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1378, independent: 1369, independent conditional: 0, independent unconditional: 1369, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2614, independent: 1223, independent conditional: 0, independent unconditional: 1223, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 1378, unknown conditional: 0, unknown unconditional: 1378] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 126 PlacesBefore, 41 PlacesAfterwards, 139 TransitionsBefore, 44 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 17 ConcurrentYvCompositions, 10 ChoiceCompositions, 112 TotalNumberOfCompositions, 8938 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7564, independent: 7516, independent conditional: 0, independent unconditional: 7516, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3463, independent: 3455, independent conditional: 0, independent unconditional: 3455, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7564, independent: 4061, independent conditional: 0, independent unconditional: 4061, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 3463, unknown conditional: 0, unknown unconditional: 3463] , Statistics on independence cache: Total cache size (in pairs): 175, Positive cache size: 172, Positive conditional cache size: 0, Positive unconditional cache size: 172, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 126 PlacesBefore, 41 PlacesAfterwards, 139 TransitionsBefore, 44 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 17 ConcurrentYvCompositions, 10 ChoiceCompositions, 110 TotalNumberOfCompositions, 8938 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7802, independent: 7754, independent conditional: 0, independent unconditional: 7754, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3476, independent: 3456, independent conditional: 0, independent unconditional: 3456, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7802, independent: 4298, independent conditional: 0, independent unconditional: 4298, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 3476, unknown conditional: 0, unknown unconditional: 3476] , Statistics on independence cache: Total cache size (in pairs): 180, Positive cache size: 176, Positive conditional cache size: 0, Positive unconditional cache size: 176, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 79]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] 0 int X, Y; [L67] 0 pthread_t t1[2], t2[2]; [L69] 0 X = __VERIFIER_nondet_int() [L70] CALL 0 assume_abort_if_not(X <= 10000) [L35] COND FALSE 0 !(!cond) [L70] RET 0 assume_abort_if_not(X <= 10000) [L73] 0 int asdf=0; VAL [X=10000, Y=0, asdf=0, t1={5:0}, t2={3:0}] [L73] COND TRUE 0 asdf<2 [L73] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [X=10000, Y=0, asdf=0, pthread_create(&t1[asdf], 0, thread1, 0)=-1, t1={5:0}, t2={3:0}] [L73] 0 asdf++ VAL [X=10000, Y=0, asdf=1, t1={5:0}, t2={3:0}] [L73] COND TRUE 0 asdf<2 [L41] 1 int x; [L42] 1 x = X VAL [X=10000, Y=0, x=10000] [L43] COND FALSE 1 !(x < 10000) [L47] 1 Y = Y + x [L50] 1 return 0; [L73] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [X=10000, Y=10000, \result={0:0}, asdf=1, pthread_create(&t1[asdf], 0, thread1, 0)=0, t1={5:0}, t2={3:0}, x=10000] [L73] 0 asdf++ VAL [X=10000, Y=10000, \result={0:0}, asdf=2, t1={5:0}, t2={3:0}, x=10000] [L41] 2 int x; [L42] 2 x = X VAL [X=10000, Y=10000, \result={0:0}, x=10000] [L43] COND FALSE 2 !(x < 10000) [L47] 2 Y = Y + x [L50] 2 return 0; [L73] COND FALSE 0 !(asdf<2) [L74] 0 int asdf=0; VAL [X=10000, Y=20000, \result={0:0}, asdf=0, asdf=2, t1={5:0}, t2={3:0}, x=10000] [L74] COND TRUE 0 asdf<2 [L74] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [X=10000, Y=20000, \result={0:0}, asdf=0, asdf=2, pthread_create(&t2[asdf], 0, thread2, 0)=1, t1={5:0}, t2={3:0}, x=10000] [L74] 0 asdf++ VAL [X=10000, Y=20000, \result={0:0}, asdf=1, asdf=2, t1={5:0}, t2={3:0}, x=10000] [L74] COND TRUE 0 asdf<2 [L54] 3 int x; [L55] 3 x = X VAL [X=10000, Y=20000, \result={0:0}, x=10000, x=10000] [L56] COND FALSE 3 !(x < 10000) [L60] 3 Y = Y + x [L63] 3 return 0; [L74] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [X=10000, Y=30000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, pthread_create(&t2[asdf], 0, thread2, 0)=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L74] 0 asdf++ VAL [X=10000, Y=30000, \result={0:0}, \result={0:0}, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L54] 4 int x; [L55] 4 x = X VAL [X=10000, Y=30000, \result={0:0}, \result={0:0}, x=10000, x=10000] [L56] COND FALSE 4 !(x < 10000) [L60] 4 Y = Y + x [L63] 4 return 0; [L74] COND FALSE 0 !(asdf<2) [L75] 0 int asdf=0; VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L75] COND TRUE 0 asdf<2 [L75] 0 t1[asdf] VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, t1={5:0}, t1[asdf]=-1, t2={3:0}, x=10000, x=10000] [L75] FCALL, JOIN 1 pthread_join(t1[asdf], 0) VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, t1={5:0}, t1[asdf]=-1, t2={3:0}, x=10000, x=10000] [L75] 0 asdf++ VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L75] COND TRUE 0 asdf<2 [L75] 0 t1[asdf] VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, t1={5:0}, t1[asdf]=0, t2={3:0}, x=10000, x=10000] [L75] FCALL, JOIN 2 pthread_join(t1[asdf], 0) VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, t1={5:0}, t1[asdf]=0, t2={3:0}, x=10000, x=10000] [L75] 0 asdf++ VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L75] COND FALSE 0 !(asdf<2) [L76] 0 int asdf=0; VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L76] COND TRUE 0 asdf<2 [L76] 0 t2[asdf] VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=1, x=10000, x=10000] [L76] FCALL, JOIN 3 pthread_join(t2[asdf], 0) VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=0, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=1, x=10000, x=10000] [L76] 0 asdf++ VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L76] COND TRUE 0 asdf<2 [L76] 0 t2[asdf] VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=2, x=10000, x=10000] [L76] FCALL, JOIN 4 pthread_join(t2[asdf], 0) VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=1, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, t2[asdf]=2, x=10000, x=10000] [L76] 0 asdf++ VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=2, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] [L76] COND FALSE 0 !(asdf<2) [L78] CALL 0 assume_abort_if_not(Y != 20000) [L35] COND FALSE 0 !(!cond) [L78] RET 0 assume_abort_if_not(Y != 20000) [L79] 0 reach_error() VAL [X=10000, Y=40000, \result={0:0}, \result={0:0}, asdf=2, asdf=2, asdf=2, asdf=2, t1={5:0}, t2={3:0}, x=10000, x=10000] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 118 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 138 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.8s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 181 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 147 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 348 IncrementalHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 8 mSDtfsCounter, 348 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 321 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 138 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.9s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 270 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 206 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 988 IncrementalHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 12 mSDtfsCounter, 988 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 307 GetRequests, 277 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=8, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 384 NumberOfCodeBlocks, 384 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 446 ConstructedInterpolants, 0 QuantifiedInterpolants, 620 SizeOfPredicates, 0 NumberOfNonLiveVariables, 898 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 132/147 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 03:31:06,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...