/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 TOGETHER -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 [2023-08-03 21:09:51,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:09:51,339 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:09:51,345 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:09:51,345 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:09:51,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:09:51,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:09:51,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:09:51,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:09:51,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:09:51,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:09:51,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:09:51,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:09:51,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:09:51,383 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:09:51,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:09:51,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:09:51,383 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:09:51,384 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:09:51,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:09:51,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:09:51,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:09:51,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:09:51,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:09:51,386 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:09:51,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:09:51,386 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:09:51,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:09:51,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:09:51,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:09:51,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:09:51,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:09:51,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:09:51,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:09:51,390 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:09:51,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 21:09:51,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:09:51,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:09:51,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:09:51,650 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:09:51,651 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:09:51,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy11.wvr_bound2.c [2023-08-03 21:09:52,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:09:53,047 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:09:53,047 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy11.wvr_bound2.c [2023-08-03 21:09:53,053 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929f0d2bd/96a2c54649244f15aa48077bc92af767/FLAG0bc745689 [2023-08-03 21:09:53,065 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929f0d2bd/96a2c54649244f15aa48077bc92af767 [2023-08-03 21:09:53,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:09:53,069 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:09:53,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:09:53,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:09:53,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:09:53,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e8e752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53, skipping insertion in model container [2023-08-03 21:09:53,074 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,093 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:09:53,231 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] [2023-08-03 21:09:53,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:09:53,239 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:09:53,269 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] [2023-08-03 21:09:53,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:09:53,276 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:09:53,277 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:09:53,282 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:09:53,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53 WrapperNode [2023-08-03 21:09:53,282 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:09:53,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:09:53,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:09:53,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:09:53,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,294 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,310 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2023-08-03 21:09:53,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:09:53,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:09:53,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:09:53,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:09:53,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,326 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,332 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,335 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:09:53,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:09:53,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:09:53,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:09:53,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (1/1) ... [2023-08-03 21:09:53,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:09:53,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:53,374 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) [2023-08-03 21:09:53,400 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 [2023-08-03 21:09:53,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:09:53,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 21:09:53,413 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 21:09:53,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 21:09:53,413 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 21:09:53,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:09:53,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:09:53,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:09:53,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 21:09:53,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 21:09:53,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:09:53,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:09:53,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:09:53,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:09:53,418 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:09:53,525 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:09:53,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:09:53,760 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:09:53,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:09:53,766 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 21:09:53,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:09:53 BoogieIcfgContainer [2023-08-03 21:09:53,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:09:53,770 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:09:53,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:09:53,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:09:53,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:09:53" (1/3) ... [2023-08-03 21:09:53,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a08cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:09:53, skipping insertion in model container [2023-08-03 21:09:53,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:09:53" (2/3) ... [2023-08-03 21:09:53,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a08cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:09:53, skipping insertion in model container [2023-08-03 21:09:53,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:09:53" (3/3) ... [2023-08-03 21:09:53,787 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy11.wvr_bound2.c [2023-08-03 21:09:53,794 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:09:53,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:09:53,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:09:53,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:09:53,880 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:09:53,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-03 21:09:54,031 INFO L124 PetriNetUnfolderBase]: 33/252 cut-off events. [2023-08-03 21:09:54,032 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:09:54,040 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. [2023-08-03 21:09:54,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 244 flow [2023-08-03 21:09:54,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 111 transitions, 244 flow [2023-08-03 21:09:54,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:09:54,065 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-03 21:09:54,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-03 21:09:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-03 21:09:54,117 INFO L124 PetriNetUnfolderBase]: 33/252 cut-off events. [2023-08-03 21:09:54,118 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:09:54,119 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. [2023-08-03 21:09:54,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-03 21:09:56,140 INFO L134 LiptonReduction]: Checked pairs total: 2946 [2023-08-03 21:09:56,140 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-03 21:09:56,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:09:56,172 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;@d557fff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:09:56,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:09:56,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:09:56,178 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 21:09:56,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:09:56,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:56,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:09:56,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:56,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 407209362, now seen corresponding path program 1 times [2023-08-03 21:09:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98748246] [2023-08-03 21:09:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:56,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98748246] [2023-08-03 21:09:56,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98748246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:56,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:56,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:09:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472768949] [2023-08-03 21:09:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:56,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:56,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 204 [2023-08-03 21:09:56,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:56,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:56,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 204 [2023-08-03 21:09:56,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:56,554 INFO L124 PetriNetUnfolderBase]: 205/363 cut-off events. [2023-08-03 21:09:56,555 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 21:09:56,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 363 events. 205/363 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1200 event pairs, 56 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 594. Up to 338 conditions per place. [2023-08-03 21:09:56,561 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-03 21:09:56,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 146 flow [2023-08-03 21:09:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-03 21:09:56,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016339869281046 [2023-08-03 21:09:56,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-03 21:09:56,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-03 21:09:56,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:56,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-03 21:09:56,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:56,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:56,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:56,598 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 307 transitions. [2023-08-03 21:09:56,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 146 flow [2023-08-03 21:09:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:09:56,604 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-08-03 21:09:56,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-03 21:09:56,610 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 21:09:56,610 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-08-03 21:09:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:56,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:56,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:09:56,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:09:56,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:56,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:56,612 INFO L85 PathProgramCache]: Analyzing trace with hash -233473453, now seen corresponding path program 1 times [2023-08-03 21:09:56,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:56,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749324193] [2023-08-03 21:09:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:09:56,643 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:09:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:09:56,672 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:09:56,672 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:09:56,674 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 21:09:56,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:09:56,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 21:09:56,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 21:09:56,676 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 21:09:56,678 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:09:56,678 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:09:56,696 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:09:56,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 326 flow [2023-08-03 21:09:56,774 INFO L124 PetriNetUnfolderBase]: 134/832 cut-off events. [2023-08-03 21:09:56,774 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:09:56,779 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. [2023-08-03 21:09:56,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 139 transitions, 326 flow [2023-08-03 21:09:56,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 139 transitions, 326 flow [2023-08-03 21:09:56,783 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:09:56,783 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 139 transitions, 326 flow [2023-08-03 21:09:56,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 139 transitions, 326 flow [2023-08-03 21:09:56,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 326 flow [2023-08-03 21:09:56,850 INFO L124 PetriNetUnfolderBase]: 134/832 cut-off events. [2023-08-03 21:09:56,850 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:09:56,854 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. [2023-08-03 21:09:56,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-03 21:09:58,743 INFO L134 LiptonReduction]: Checked pairs total: 8938 [2023-08-03 21:09:58,743 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-03 21:09:58,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:09:58,746 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;@d557fff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:09:58,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:09:58,748 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:09:58,748 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 21:09:58,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:09:58,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:58,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:09:58,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:58,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:58,750 INFO L85 PathProgramCache]: Analyzing trace with hash 673006365, now seen corresponding path program 1 times [2023-08-03 21:09:58,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:58,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519272657] [2023-08-03 21:09:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:58,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:58,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:58,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519272657] [2023-08-03 21:09:58,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519272657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:58,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:09:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526201712] [2023-08-03 21:09:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:58,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 251 [2023-08-03 21:09:58,798 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) [2023-08-03 21:09:58,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:58,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 251 [2023-08-03 21:09:58,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:59,347 INFO L124 PetriNetUnfolderBase]: 6653/9167 cut-off events. [2023-08-03 21:09:59,347 INFO L125 PetriNetUnfolderBase]: For 1016/1016 co-relation queries the response was YES. [2023-08-03 21:09:59,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18683 conditions, 9167 events. 6653/9167 cut-off events. For 1016/1016 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 40590 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. [2023-08-03 21:09:59,408 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-03 21:09:59,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 228 flow [2023-08-03 21:09:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-03 21:09:59,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046480743691899 [2023-08-03 21:09:59,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-03 21:09:59,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-03 21:09:59,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:59,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-03 21:09:59,412 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) [2023-08-03 21:09:59,414 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) [2023-08-03 21:09:59,415 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) [2023-08-03 21:09:59,415 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 380 transitions. [2023-08-03 21:09:59,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 228 flow [2023-08-03 21:09:59,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:09:59,419 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 146 flow [2023-08-03 21:09:59,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, 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=146, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-03 21:09:59,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-03 21:09:59,420 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 146 flow [2023-08-03 21:09:59,420 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) [2023-08-03 21:09:59,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:59,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:59,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:09:59,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:59,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash 427915779, now seen corresponding path program 1 times [2023-08-03 21:09:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373351449] [2023-08-03 21:09:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:59,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:59,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373351449] [2023-08-03 21:09:59,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373351449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:59,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852833860] [2023-08-03 21:09:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:59,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:59,550 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) [2023-08-03 21:09:59,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:09:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:59,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:09:59,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:09:59,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:09:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852833860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:59,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:09:59,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:09:59,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102486243] [2023-08-03 21:09:59,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:59,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:59,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:59,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 251 [2023-08-03 21:09:59,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 146 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) [2023-08-03 21:09:59,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:59,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 251 [2023-08-03 21:09:59,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:00,220 INFO L124 PetriNetUnfolderBase]: 6641/9206 cut-off events. [2023-08-03 21:10:00,221 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2023-08-03 21:10:00,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18740 conditions, 9206 events. 6641/9206 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 41188 event pairs, 3020 based on Foata normal form. 0/6435 useless extension candidates. Maximal degree in co-relation 18704. Up to 8589 conditions per place. [2023-08-03 21:10:00,283 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 21:10:00,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 266 flow [2023-08-03 21:10:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:10:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:10:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-03 21:10:00,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112881806108898 [2023-08-03 21:10:00,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-03 21:10:00,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-03 21:10:00,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:00,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-03 21:10:00,286 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) [2023-08-03 21:10:00,288 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) [2023-08-03 21:10:00,288 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) [2023-08-03 21:10:00,288 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 146 flow. Second operand 3 states and 385 transitions. [2023-08-03 21:10:00,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 266 flow [2023-08-03 21:10:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:10:00,291 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-08-03 21:10:00,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=144, 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=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-03 21:10:00,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-03 21:10:00,293 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-08-03 21:10:00,293 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) [2023-08-03 21:10:00,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:00,293 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:10:00,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:10:00,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:00,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:00,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 66820544, now seen corresponding path program 1 times [2023-08-03 21:10:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905871380] [2023-08-03 21:10:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:10:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905871380] [2023-08-03 21:10:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905871380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88652444] [2023-08-03 21:10:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:00,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:00,598 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) [2023-08-03 21:10:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:10:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:00,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:10:00,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:10:00,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:10:00,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88652444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:10:00,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:10:00,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:10:00,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643749936] [2023-08-03 21:10:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:10:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:10:00,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:00,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:10:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:10:00,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-03 21:10:00,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 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) [2023-08-03 21:10:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-03 21:10:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:01,250 INFO L124 PetriNetUnfolderBase]: 6623/9176 cut-off events. [2023-08-03 21:10:01,250 INFO L125 PetriNetUnfolderBase]: For 1097/1097 co-relation queries the response was YES. [2023-08-03 21:10:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19011 conditions, 9176 events. 6623/9176 cut-off events. For 1097/1097 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 41129 event pairs, 2000 based on Foata normal form. 9/6564 useless extension candidates. Maximal degree in co-relation 5833. Up to 8699 conditions per place. [2023-08-03 21:10:01,309 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 46 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-03 21:10:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 277 flow [2023-08-03 21:10:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:10:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:10:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-08-03 21:10:01,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820717131474104 [2023-08-03 21:10:01,311 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-08-03 21:10:01,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-08-03 21:10:01,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:01,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-08-03 21:10:01,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:01,315 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) [2023-08-03 21:10:01,316 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) [2023-08-03 21:10:01,316 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 5 states and 605 transitions. [2023-08-03 21:10:01,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 277 flow [2023-08-03 21:10:01,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:10:01,322 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 165 flow [2023-08-03 21:10:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-03 21:10:01,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 21:10:01,324 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 165 flow [2023-08-03 21:10:01,324 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) [2023-08-03 21:10:01,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:01,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:10:01,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:10:01,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:01,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:01,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1323578315, now seen corresponding path program 1 times [2023-08-03 21:10:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:01,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206969853] [2023-08-03 21:10:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:10:01,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206969853] [2023-08-03 21:10:01,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206969853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333001198] [2023-08-03 21:10:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:01,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:01,617 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) [2023-08-03 21:10:01,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:10:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:01,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:10:01,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:10:01,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:10:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333001198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:10:01,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:10:01,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:10:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939656706] [2023-08-03 21:10:01,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:10:01,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:10:01,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:10:01,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:10:01,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 251 [2023-08-03 21:10:01,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 165 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) [2023-08-03 21:10:01,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:01,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 251 [2023-08-03 21:10:01,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:02,173 INFO L124 PetriNetUnfolderBase]: 5672/7994 cut-off events. [2023-08-03 21:10:02,173 INFO L125 PetriNetUnfolderBase]: For 847/847 co-relation queries the response was YES. [2023-08-03 21:10:02,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16549 conditions, 7994 events. 5672/7994 cut-off events. For 847/847 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 35789 event pairs, 2602 based on Foata normal form. 0/5815 useless extension candidates. Maximal degree in co-relation 5699. Up to 5730 conditions per place. [2023-08-03 21:10:02,213 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 56 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 21:10:02,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 327 flow [2023-08-03 21:10:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:10:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:10:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-03 21:10:02,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205843293492696 [2023-08-03 21:10:02,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-03 21:10:02,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-03 21:10:02,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:02,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-03 21:10:02,216 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) [2023-08-03 21:10:02,218 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) [2023-08-03 21:10:02,218 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) [2023-08-03 21:10:02,218 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 165 flow. Second operand 3 states and 392 transitions. [2023-08-03 21:10:02,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 327 flow [2023-08-03 21:10:02,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 320 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:10:02,221 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 170 flow [2023-08-03 21:10:02,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-03 21:10:02,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 21:10:02,222 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 170 flow [2023-08-03 21:10:02,222 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) [2023-08-03 21:10:02,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:02,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:10:02,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:10:02,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:02,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:02,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2015593482, now seen corresponding path program 1 times [2023-08-03 21:10:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999696559] [2023-08-03 21:10:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:02,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999696559] [2023-08-03 21:10:02,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999696559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:02,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481606924] [2023-08-03 21:10:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:02,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:02,506 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) [2023-08-03 21:10:02,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:10:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:02,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:10:02,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:02,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:10:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:02,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481606924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:10:02,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:10:02,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 21:10:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064085045] [2023-08-03 21:10:02,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:10:02,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:10:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:10:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:10:02,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-03 21:10:02,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:02,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:02,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-03 21:10:02,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:03,036 INFO L124 PetriNetUnfolderBase]: 5120/7187 cut-off events. [2023-08-03 21:10:03,036 INFO L125 PetriNetUnfolderBase]: For 1327/1327 co-relation queries the response was YES. [2023-08-03 21:10:03,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15423 conditions, 7187 events. 5120/7187 cut-off events. For 1327/1327 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 30890 event pairs, 1569 based on Foata normal form. 3/5367 useless extension candidates. Maximal degree in co-relation 4813. Up to 6813 conditions per place. [2023-08-03 21:10:03,067 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 47 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-03 21:10:03,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 284 flow [2023-08-03 21:10:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:10:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:10:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-08-03 21:10:03,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910358565737052 [2023-08-03 21:10:03,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-08-03 21:10:03,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-08-03 21:10:03,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:03,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-08-03 21:10:03,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:03,072 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) [2023-08-03 21:10:03,073 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) [2023-08-03 21:10:03,073 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 170 flow. Second operand 4 states and 493 transitions. [2023-08-03 21:10:03,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 284 flow [2023-08-03 21:10:03,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:10:03,079 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 166 flow [2023-08-03 21:10:03,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=166, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 21:10:03,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 21:10:03,079 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 166 flow [2023-08-03 21:10:03,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:03,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:03,080 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:10:03,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 21:10:03,285 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 [2023-08-03 21:10:03,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:03,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash -732765457, now seen corresponding path program 1 times [2023-08-03 21:10:03,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:03,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927672748] [2023-08-03 21:10:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:10:03,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:03,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927672748] [2023-08-03 21:10:03,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927672748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:03,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317284112] [2023-08-03 21:10:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:03,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:03,375 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) [2023-08-03 21:10:03,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:10:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:03,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:10:03,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:10:03,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:10:03,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317284112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:10:03,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:10:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:10:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915205846] [2023-08-03 21:10:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:10:03,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:10:03,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:10:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:10:03,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-03 21:10:03,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 166 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) [2023-08-03 21:10:03,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:03,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-03 21:10:03,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:03,895 INFO L124 PetriNetUnfolderBase]: 4796/6755 cut-off events. [2023-08-03 21:10:03,895 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2023-08-03 21:10:03,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14410 conditions, 6755 events. 4796/6755 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 28898 event pairs, 93 based on Foata normal form. 81/5121 useless extension candidates. Maximal degree in co-relation 6253. Up to 5669 conditions per place. [2023-08-03 21:10:03,922 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 65 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-03 21:10:03,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 360 flow [2023-08-03 21:10:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:10:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:10:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2023-08-03 21:10:03,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964143426294821 [2023-08-03 21:10:03,924 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2023-08-03 21:10:03,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2023-08-03 21:10:03,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:03,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2023-08-03 21:10:03,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:03,928 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) [2023-08-03 21:10:03,929 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) [2023-08-03 21:10:03,929 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 166 flow. Second operand 5 states and 623 transitions. [2023-08-03 21:10:03,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 360 flow [2023-08-03 21:10:03,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 348 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 21:10:03,936 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 171 flow [2023-08-03 21:10:03,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 21:10:03,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 21:10:03,937 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 171 flow [2023-08-03 21:10:03,938 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) [2023-08-03 21:10:03,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:03,938 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] [2023-08-03 21:10:03,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 21:10:04,142 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 [2023-08-03 21:10:04,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:04,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash 760063272, now seen corresponding path program 1 times [2023-08-03 21:10:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:04,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274851593] [2023-08-03 21:10:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 21:10:04,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:04,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274851593] [2023-08-03 21:10:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274851593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:04,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962923329] [2023-08-03 21:10:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:04,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:04,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:04,201 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) [2023-08-03 21:10:04,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:10:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:04,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:10:04,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:04,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:10:04,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962923329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:10:04,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:10:04,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 21:10:04,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969529306] [2023-08-03 21:10:04,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:10:04,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:10:04,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:10:04,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:10:04,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 251 [2023-08-03 21:10:04,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:04,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:04,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 251 [2023-08-03 21:10:04,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:04,637 INFO L124 PetriNetUnfolderBase]: 4697/6708 cut-off events. [2023-08-03 21:10:04,637 INFO L125 PetriNetUnfolderBase]: For 1748/1748 co-relation queries the response was YES. [2023-08-03 21:10:04,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14552 conditions, 6708 events. 4697/6708 cut-off events. For 1748/1748 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 29214 event pairs, 2351 based on Foata normal form. 0/5125 useless extension candidates. Maximal degree in co-relation 6453. Up to 4881 conditions per place. [2023-08-03 21:10:04,669 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 21:10:04,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 333 flow [2023-08-03 21:10:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:10:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:10:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-03 21:10:04,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205843293492696 [2023-08-03 21:10:04,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-03 21:10:04,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-03 21:10:04,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:04,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-03 21:10:04,672 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) [2023-08-03 21:10:04,674 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) [2023-08-03 21:10:04,674 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) [2023-08-03 21:10:04,674 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 171 flow. Second operand 3 states and 392 transitions. [2023-08-03 21:10:04,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 333 flow [2023-08-03 21:10:04,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 326 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:10:04,678 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 176 flow [2023-08-03 21:10:04,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-03 21:10:04,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-03 21:10:04,679 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 176 flow [2023-08-03 21:10:04,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:04,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:04,679 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] [2023-08-03 21:10:04,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 21:10:04,885 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 [2023-08-03 21:10:04,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:04,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash -220435216, now seen corresponding path program 1 times [2023-08-03 21:10:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240414266] [2023-08-03 21:10:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:04,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:04,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240414266] [2023-08-03 21:10:04,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240414266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:04,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189584121] [2023-08-03 21:10:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:04,962 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) [2023-08-03 21:10:04,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:10:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:05,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:10:05,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:05,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:10:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:10:05,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189584121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:10:05,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:10:05,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:10:05,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391362986] [2023-08-03 21:10:05,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:10:05,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:10:05,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:10:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:10:05,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-03 21:10:05,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 176 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) [2023-08-03 21:10:05,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:05,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-03 21:10:05,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:05,428 INFO L124 PetriNetUnfolderBase]: 4454/6357 cut-off events. [2023-08-03 21:10:05,428 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-03 21:10:05,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14024 conditions, 6357 events. 4454/6357 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 26504 event pairs, 1344 based on Foata normal form. 27/4940 useless extension candidates. Maximal degree in co-relation 9009. Up to 5352 conditions per place. [2023-08-03 21:10:05,451 INFO L140 encePairwiseOnDemand]: 248/251 looper letters, 60 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-03 21:10:05,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 340 flow [2023-08-03 21:10:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:10:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:10:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 505 transitions. [2023-08-03 21:10:05,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029880478087649 [2023-08-03 21:10:05,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 505 transitions. [2023-08-03 21:10:05,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 505 transitions. [2023-08-03 21:10:05,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:05,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 505 transitions. [2023-08-03 21:10:05,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:05,457 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) [2023-08-03 21:10:05,457 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) [2023-08-03 21:10:05,457 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 176 flow. Second operand 4 states and 505 transitions. [2023-08-03 21:10:05,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 340 flow [2023-08-03 21:10:05,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:10:05,471 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 172 flow [2023-08-03 21:10:05,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=172, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-03 21:10:05,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-03 21:10:05,472 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 172 flow [2023-08-03 21:10:05,472 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) [2023-08-03 21:10:05,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:05,473 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] [2023-08-03 21:10:05,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 21:10:05,677 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 [2023-08-03 21:10:05,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:05,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 861003585, now seen corresponding path program 1 times [2023-08-03 21:10:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182813507] [2023-08-03 21:10:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:10:05,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:05,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182813507] [2023-08-03 21:10:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182813507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:05,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591257698] [2023-08-03 21:10:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:05,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:05,727 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) [2023-08-03 21:10:05,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:10:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:05,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:10:05,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:10:05,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:10:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:10:05,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591257698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:10:05,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:10:05,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:10:05,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141218221] [2023-08-03 21:10:05,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:10:05,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:10:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:10:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:10:05,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-03 21:10:05,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 172 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) [2023-08-03 21:10:05,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:05,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-03 21:10:05,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:06,101 INFO L124 PetriNetUnfolderBase]: 3272/4665 cut-off events. [2023-08-03 21:10:06,101 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2023-08-03 21:10:06,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10348 conditions, 4665 events. 3272/4665 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18056 event pairs, 855 based on Foata normal form. 108/3693 useless extension candidates. Maximal degree in co-relation 9126. Up to 1876 conditions per place. [2023-08-03 21:10:06,117 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 67 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-03 21:10:06,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 382 flow [2023-08-03 21:10:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:10:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:10:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-08-03 21:10:06,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109561752988048 [2023-08-03 21:10:06,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-08-03 21:10:06,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-08-03 21:10:06,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:06,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-08-03 21:10:06,122 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) [2023-08-03 21:10:06,125 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) [2023-08-03 21:10:06,126 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) [2023-08-03 21:10:06,126 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 172 flow. Second operand 4 states and 513 transitions. [2023-08-03 21:10:06,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 382 flow [2023-08-03 21:10:06,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:10:06,133 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 186 flow [2023-08-03 21:10:06,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=55, PETRI_TRANSITIONS=46} [2023-08-03 21:10:06,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 21:10:06,134 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 186 flow [2023-08-03 21:10:06,134 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) [2023-08-03 21:10:06,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:06,134 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] [2023-08-03 21:10:06,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 21:10:06,338 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 [2023-08-03 21:10:06,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:06,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1544319046, now seen corresponding path program 1 times [2023-08-03 21:10:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326134249] [2023-08-03 21:10:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:06,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:10:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:10:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326134249] [2023-08-03 21:10:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326134249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:10:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77653616] [2023-08-03 21:10:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:06,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:10:06,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:10:06,399 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) [2023-08-03 21:10:06,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 21:10:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:10:06,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:10:06,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:10:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:10:06,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:10:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:10:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77653616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:10:06,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:10:06,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:10:06,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781408679] [2023-08-03 21:10:06,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:10:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:10:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:10:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:10:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:10:06,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 251 [2023-08-03 21:10:06,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 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) [2023-08-03 21:10:06,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:10:06,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 251 [2023-08-03 21:10:06,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:06,799 INFO L124 PetriNetUnfolderBase]: 3260/4642 cut-off events. [2023-08-03 21:10:06,799 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2023-08-03 21:10:06,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10968 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 17879 event pairs, 1969 based on Foata normal form. 13/3579 useless extension candidates. Maximal degree in co-relation 9736. Up to 3933 conditions per place. [2023-08-03 21:10:06,813 INFO L140 encePairwiseOnDemand]: 247/251 looper letters, 67 selfloop transitions, 3 changer transitions 2/76 dead transitions. [2023-08-03 21:10:06,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 398 flow [2023-08-03 21:10:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:10:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:10:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-08-03 21:10:06,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109561752988048 [2023-08-03 21:10:06,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-08-03 21:10:06,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-08-03 21:10:06,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:06,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-08-03 21:10:06,816 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) [2023-08-03 21:10:06,818 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) [2023-08-03 21:10:06,818 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) [2023-08-03 21:10:06,818 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 186 flow. Second operand 4 states and 513 transitions. [2023-08-03 21:10:06,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 398 flow [2023-08-03 21:10:06,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:10:06,828 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 190 flow [2023-08-03 21:10:06,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=59, PETRI_TRANSITIONS=45} [2023-08-03 21:10:06,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 21:10:06,829 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 190 flow [2023-08-03 21:10:06,829 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) [2023-08-03 21:10:06,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:10:06,830 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] [2023-08-03 21:10:06,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 21:10:07,034 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 [2023-08-03 21:10:07,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:10:07,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:10:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash -607025601, now seen corresponding path program 1 times [2023-08-03 21:10:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:10:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048686388] [2023-08-03 21:10:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:10:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:10:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:10:07,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:10:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:10:07,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:10:07,176 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:10:07,176 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 21:10:07,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 21:10:07,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 21:10:07,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:10:07,177 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:10:07,180 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:10:07,180 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:10:07,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:10:07 BasicIcfg [2023-08-03 21:10:07,256 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:10:07,256 INFO L158 Benchmark]: Toolchain (without parser) took 14187.77ms. Allocated memory was 497.0MB in the beginning and 717.2MB in the end (delta: 220.2MB). Free memory was 449.6MB in the beginning and 520.1MB in the end (delta: -70.5MB). Peak memory consumption was 150.9MB. Max. memory is 16.0GB. [2023-08-03 21:10:07,257 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 348.1MB. Free memory was 298.6MB in the beginning and 298.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:10:07,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.03ms. Allocated memory is still 497.0MB. Free memory was 449.3MB in the beginning and 438.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-03 21:10:07,257 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.12ms. Allocated memory is still 497.0MB. Free memory was 438.3MB in the beginning and 436.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:10:07,257 INFO L158 Benchmark]: Boogie Preprocessor took 23.70ms. Allocated memory is still 497.0MB. Free memory was 436.7MB in the beginning and 435.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:10:07,257 INFO L158 Benchmark]: RCFGBuilder took 432.97ms. Allocated memory is still 497.0MB. Free memory was 435.4MB in the beginning and 421.7MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 21:10:07,258 INFO L158 Benchmark]: TraceAbstraction took 13485.99ms. Allocated memory was 497.0MB in the beginning and 717.2MB in the end (delta: 220.2MB). Free memory was 421.0MB in the beginning and 520.1MB in the end (delta: -99.0MB). Peak memory consumption was 121.5MB. Max. memory is 16.0GB. [2023-08-03 21:10:07,259 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 348.1MB. Free memory was 298.6MB in the beginning and 298.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 213.03ms. Allocated memory is still 497.0MB. Free memory was 449.3MB in the beginning and 438.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.12ms. Allocated memory is still 497.0MB. Free memory was 438.3MB in the beginning and 436.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.70ms. Allocated memory is still 497.0MB. Free memory was 436.7MB in the beginning and 435.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 432.97ms. Allocated memory is still 497.0MB. Free memory was 435.4MB in the beginning and 421.7MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 13485.99ms. Allocated memory was 497.0MB in the beginning and 717.2MB in the end (delta: 220.2MB). Free memory was 421.0MB in the beginning and 520.1MB in the end (delta: -99.0MB). Peak memory consumption was 121.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 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: 2.0s, 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 - 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={3:0}, t2={5:0}] [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)=-2, t1={3:0}, t2={5:0}] [L73] 0 asdf++ VAL [X=10000, Y=0, asdf=1, t1={3:0}, t2={5:0}] [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)=-1, t1={3:0}, t2={5:0}, x=10000] [L73] 0 asdf++ VAL [X=10000, Y=10000, \result={0:0}, asdf=2, t1={3:0}, t2={5:0}, 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={3:0}, t2={5:0}, 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)=0, t1={3:0}, t2={5:0}, x=10000] [L74] 0 asdf++ VAL [X=10000, Y=20000, \result={0:0}, asdf=1, asdf=2, t1={3:0}, t2={5:0}, 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)=1, t1={3:0}, t2={5:0}, x=10000, x=10000] [L74] 0 asdf++ VAL [X=10000, Y=30000, \result={0:0}, \result={0:0}, asdf=2, asdf=2, t1={3:0}, t2={5:0}, 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={3:0}, t2={5:0}, 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={3:0}, t1[asdf]=-2, t2={5:0}, 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={3:0}, t1[asdf]=-2, t2={5:0}, 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={3:0}, t2={5:0}, 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={3:0}, t1[asdf]=-1, t2={5:0}, 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={3:0}, t1[asdf]=-1, t2={5:0}, 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={3:0}, t2={5:0}, 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={3:0}, t2={5:0}, 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={3:0}, t2={5:0}, t2[asdf]=0, 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={3:0}, t2={5:0}, t2[asdf]=0, 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={3:0}, t2={5:0}, 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={3:0}, t2={5:0}, t2[asdf]=1, 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={3:0}, t2={5:0}, t2[asdf]=1, 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={3:0}, t2={5:0}, 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={3:0}, t2={5:0}, x=10000, x=10000] - UnprovableResult [Line: 74]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 73]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data 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: 2.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 56 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 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: 10.5s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 409 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 321 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1162 IncrementalHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 13 mSDtfsCounter, 1162 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 295 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=10, InterpolantAutomatonStates: 38, 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, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 485 ConstructedInterpolants, 0 QuantifiedInterpolants, 715 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1103 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 191/216 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! [2023-08-03 21:10:07,285 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...