/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:58:33,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:58:33,075 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:58:33,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:58:33,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:58:33,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:58:33,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:58:33,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:58:33,112 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:58:33,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:58:33,116 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:58:33,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:58:33,117 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:58:33,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:58:33,118 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:58:33,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:58:33,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:58:33,119 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:58:33,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:58:33,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:58:33,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:58:33,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:58:33,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:58:33,120 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:58:33,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:58:33,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:58:33,121 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:58:33,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:58:33,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:58:33,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:58:33,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:58:33,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:58:33,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:58:33,123 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:58:33,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:58:33,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:58:33,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:58:33,124 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:58:33,124 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:58:33,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:58:33,124 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:58:33,124 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:58:33,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:58:33,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:58:33,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:58:33,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:58:33,435 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:58:33,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c [2023-08-04 01:58:34,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:58:34,884 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:58:34,885 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-symm.wvr_bound2.c [2023-08-04 01:58:34,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda2d62e5/cd4c9c26f185427399e7176892edbd25/FLAG7b3d2e6ca [2023-08-04 01:58:34,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda2d62e5/cd4c9c26f185427399e7176892edbd25 [2023-08-04 01:58:34,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:58:34,914 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:58:34,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:58:34,917 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:58:34,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:58:34,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:58:34" (1/1) ... [2023-08-04 01:58:34,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701c02dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:34, skipping insertion in model container [2023-08-04 01:58:34,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:58:34" (1/1) ... [2023-08-04 01:58:34,954 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:58:35,093 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_chl-array-int-symm.wvr_bound2.c[2644,2657] [2023-08-04 01:58:35,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:58:35,107 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:58:35,126 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_chl-array-int-symm.wvr_bound2.c[2644,2657] [2023-08-04 01:58:35,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:58:35,143 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:58:35,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35 WrapperNode [2023-08-04 01:58:35,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:58:35,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:58:35,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:58:35,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:58:35,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,182 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 234 [2023-08-04 01:58:35,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:58:35,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:58:35,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:58:35,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:58:35,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,193 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,193 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,200 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,204 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:58:35,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:58:35,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:58:35,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:58:35,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (1/1) ... [2023-08-04 01:58:35,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:58:35,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:58:35,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 01:58:35,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 01:58:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:58:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:58:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:58:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:58:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 01:58:35,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 01:58:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 01:58:35,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 01:58:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:58:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 01:58:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:58:35,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:58:35,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:58:35,296 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:58:35,411 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:58:35,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:58:35,790 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:58:35,798 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:58:35,798 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 01:58:35,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:58:35 BoogieIcfgContainer [2023-08-04 01:58:35,800 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:58:35,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:58:35,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:58:35,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:58:35,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:58:34" (1/3) ... [2023-08-04 01:58:35,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3313d285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:58:35, skipping insertion in model container [2023-08-04 01:58:35,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:58:35" (2/3) ... [2023-08-04 01:58:35,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3313d285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:58:35, skipping insertion in model container [2023-08-04 01:58:35,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:58:35" (3/3) ... [2023-08-04 01:58:35,817 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-array-int-symm.wvr_bound2.c [2023-08-04 01:58:35,824 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:58:35,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:58:35,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:58:35,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:58:35,926 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:58:36,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 01:58:36,130 INFO L124 PetriNetUnfolderBase]: 57/471 cut-off events. [2023-08-04 01:58:36,130 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:58:36,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 471 events. 57/471 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1814 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-04 01:58:36,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 01:58:36,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-04 01:58:36,152 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:58:36,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 01:58:36,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 01:58:36,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 01:58:36,253 INFO L124 PetriNetUnfolderBase]: 57/471 cut-off events. [2023-08-04 01:58:36,254 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:58:36,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 471 events. 57/471 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1814 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-04 01:58:36,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 15664 [2023-08-04 01:58:42,320 INFO L134 LiptonReduction]: Checked pairs total: 22293 [2023-08-04 01:58:42,320 INFO L136 LiptonReduction]: Total number of compositions: 274 [2023-08-04 01:58:42,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:58:42,338 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;@6292c2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:58:42,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:58:42,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:58:42,345 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-08-04 01:58:42,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:58:42,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:58:42,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 01:58:42,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:58:42,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:58:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1154785340, now seen corresponding path program 1 times [2023-08-04 01:58:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:58:42,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731963917] [2023-08-04 01:58:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:58:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:58:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:58:42,529 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:58:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:58:42,574 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:58:42,575 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:58:42,576 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:58:42,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:58:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:58:42,578 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:58:42,581 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:58:42,581 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:58:42,581 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:58:42,625 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:58:42,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 01:58:42,897 INFO L124 PetriNetUnfolderBase]: 197/1360 cut-off events. [2023-08-04 01:58:42,897 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:58:42,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 1360 events. 197/1360 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8105 event pairs, 2 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 820. Up to 32 conditions per place. [2023-08-04 01:58:42,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 01:58:42,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 355 transitions, 758 flow [2023-08-04 01:58:42,931 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:58:42,931 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 355 transitions, 758 flow [2023-08-04 01:58:42,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 355 transitions, 758 flow [2023-08-04 01:58:42,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 01:58:43,117 INFO L124 PetriNetUnfolderBase]: 197/1360 cut-off events. [2023-08-04 01:58:43,117 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:58:43,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 1360 events. 197/1360 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8105 event pairs, 2 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 820. Up to 32 conditions per place. [2023-08-04 01:58:43,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 48576 [2023-08-04 01:58:49,643 INFO L134 LiptonReduction]: Checked pairs total: 78918 [2023-08-04 01:58:49,643 INFO L136 LiptonReduction]: Total number of compositions: 366 [2023-08-04 01:58:49,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:58:49,649 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;@6292c2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:58:49,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:58:49,662 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:58:49,663 INFO L124 PetriNetUnfolderBase]: 15/101 cut-off events. [2023-08-04 01:58:49,663 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:58:49,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:58:49,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 01:58:49,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:58:49,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:58:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 776824822, now seen corresponding path program 1 times [2023-08-04 01:58:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:58:49,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314920836] [2023-08-04 01:58:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:58:49,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:58:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:58:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:58:49,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:58:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314920836] [2023-08-04 01:58:49,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314920836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:58:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463499838] [2023-08-04 01:58:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:58:49,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:58:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:58:49,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:58:49,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 01:58:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:58:49,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:58:49,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:58:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:58:50,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:58:50,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463499838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:58:50,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:58:50,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:58:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653389595] [2023-08-04 01:58:50,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:58:50,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:58:50,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:58:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:58:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:58:50,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 01:58:50,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 74 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:58:50,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:58:50,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 01:58:50,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:05,202 INFO L124 PetriNetUnfolderBase]: 188103/240560 cut-off events. [2023-08-04 01:59:05,203 INFO L125 PetriNetUnfolderBase]: For 11080/11080 co-relation queries the response was YES. [2023-08-04 01:59:05,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482494 conditions, 240560 events. 188103/240560 cut-off events. For 11080/11080 co-relation queries the response was YES. Maximal size of possible extension queue 4787. Compared 1380209 event pairs, 67279 based on Foata normal form. 9907/186458 useless extension candidates. Maximal degree in co-relation 74819. Up to 235092 conditions per place. [2023-08-04 01:59:05,929 INFO L140 encePairwiseOnDemand]: 714/721 looper letters, 72 selfloop transitions, 5 changer transitions 20/100 dead transitions. [2023-08-04 01:59:05,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 432 flow [2023-08-04 01:59:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:59:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:59:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1660 transitions. [2023-08-04 01:59:05,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604715672676838 [2023-08-04 01:59:05,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1660 transitions. [2023-08-04 01:59:05,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1660 transitions. [2023-08-04 01:59:05,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:05,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1660 transitions. [2023-08-04 01:59:05,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:05,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 721.0) internal successors, (4326), 6 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:05,981 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 721.0) internal successors, (4326), 6 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:05,983 INFO L175 Difference]: Start difference. First operand has 63 places, 74 transitions, 196 flow. Second operand 5 states and 1660 transitions. [2023-08-04 01:59:05,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 432 flow [2023-08-04 01:59:06,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:59:06,003 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 141 flow [2023-08-04 01:59:06,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-08-04 01:59:06,013 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-04 01:59:06,013 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 141 flow [2023-08-04 01:59:06,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:06,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:06,015 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:06,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 01:59:06,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:06,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:59:06,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1608069305, now seen corresponding path program 1 times [2023-08-04 01:59:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915329742] [2023-08-04 01:59:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:59:06,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:06,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915329742] [2023-08-04 01:59:06,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915329742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:59:06,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:59:06,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 01:59:06,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829103068] [2023-08-04 01:59:06,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:59:06,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:59:06,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:06,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:59:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:59:06,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 721 [2023-08-04 01:59:06,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:06,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:06,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 721 [2023-08-04 01:59:06,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:09,727 INFO L124 PetriNetUnfolderBase]: 43316/55025 cut-off events. [2023-08-04 01:59:09,727 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2023-08-04 01:59:09,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111636 conditions, 55025 events. 43316/55025 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 1426. Compared 267132 event pairs, 22416 based on Foata normal form. 1/42341 useless extension candidates. Maximal degree in co-relation 14650. Up to 54325 conditions per place. [2023-08-04 01:59:09,993 INFO L140 encePairwiseOnDemand]: 718/721 looper letters, 57 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 01:59:09,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 276 flow [2023-08-04 01:59:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:59:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:59:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2023-08-04 01:59:09,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4613962089690245 [2023-08-04 01:59:09,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2023-08-04 01:59:09,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2023-08-04 01:59:09,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:09,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2023-08-04 01:59:10,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:10,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:10,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:10,005 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 141 flow. Second operand 3 states and 998 transitions. [2023-08-04 01:59:10,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 276 flow [2023-08-04 01:59:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 273 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:59:10,012 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 137 flow [2023-08-04 01:59:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-04 01:59:10,013 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-04 01:59:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 137 flow [2023-08-04 01:59:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:10,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:10,015 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:59:10,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:59:10,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1922729611, now seen corresponding path program 1 times [2023-08-04 01:59:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996191226] [2023-08-04 01:59:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:59:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996191226] [2023-08-04 01:59:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996191226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:59:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580041104] [2023-08-04 01:59:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:59:10,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:59:10,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 01:59:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:10,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:59:10,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:59:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:59:10,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:59:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:59:10,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580041104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:59:10,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:59:10,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:59:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196585182] [2023-08-04 01:59:10,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:59:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:59:10,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:59:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:59:10,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 01:59:10,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:10,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:10,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 01:59:10,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:13,076 INFO L124 PetriNetUnfolderBase]: 39290/49575 cut-off events. [2023-08-04 01:59:13,076 INFO L125 PetriNetUnfolderBase]: For 1256/1256 co-relation queries the response was YES. [2023-08-04 01:59:13,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100257 conditions, 49575 events. 39290/49575 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 1392. Compared 233572 event pairs, 12432 based on Foata normal form. 8/38112 useless extension candidates. Maximal degree in co-relation 14633. Up to 48770 conditions per place. [2023-08-04 01:59:13,351 INFO L140 encePairwiseOnDemand]: 718/721 looper letters, 72 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-04 01:59:13,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 78 transitions, 338 flow [2023-08-04 01:59:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:59:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:59:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1324 transitions. [2023-08-04 01:59:13,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590846047156727 [2023-08-04 01:59:13,355 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1324 transitions. [2023-08-04 01:59:13,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1324 transitions. [2023-08-04 01:59:13,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:13,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1324 transitions. [2023-08-04 01:59:13,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:13,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:13,366 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 721.0) internal successors, (3605), 5 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:13,366 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 137 flow. Second operand 4 states and 1324 transitions. [2023-08-04 01:59:13,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 78 transitions, 338 flow [2023-08-04 01:59:13,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:59:13,369 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 134 flow [2023-08-04 01:59:13,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-04 01:59:13,372 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-04 01:59:13,372 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 134 flow [2023-08-04 01:59:13,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:13,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:13,373 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:13,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:59:13,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 01:59:13,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:59:13,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -873020050, now seen corresponding path program 1 times [2023-08-04 01:59:13,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:13,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974054512] [2023-08-04 01:59:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:59:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974054512] [2023-08-04 01:59:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974054512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:59:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618713599] [2023-08-04 01:59:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:13,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:59:13,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:59:13,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:59:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:13,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:59:13,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:59:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:59:13,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:59:13,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618713599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:59:13,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:59:13,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:59:13,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373233042] [2023-08-04 01:59:13,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:59:13,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:59:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:59:13,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:59:13,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 721 [2023-08-04 01:59:13,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:13,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:13,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 721 [2023-08-04 01:59:13,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:15,818 INFO L124 PetriNetUnfolderBase]: 26795/34165 cut-off events. [2023-08-04 01:59:15,819 INFO L125 PetriNetUnfolderBase]: For 817/817 co-relation queries the response was YES. [2023-08-04 01:59:15,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69384 conditions, 34165 events. 26795/34165 cut-off events. For 817/817 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 155140 event pairs, 160 based on Foata normal form. 2744/28819 useless extension candidates. Maximal degree in co-relation 33745. Up to 16345 conditions per place. [2023-08-04 01:59:15,866 INFO L140 encePairwiseOnDemand]: 718/721 looper letters, 0 selfloop transitions, 0 changer transitions 127/127 dead transitions. [2023-08-04 01:59:15,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 127 transitions, 534 flow [2023-08-04 01:59:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:59:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:59:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1685 transitions. [2023-08-04 01:59:15,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46740638002773927 [2023-08-04 01:59:15,871 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1685 transitions. [2023-08-04 01:59:15,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1685 transitions. [2023-08-04 01:59:15,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:15,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1685 transitions. [2023-08-04 01:59:15,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:15,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 721.0) internal successors, (4326), 6 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:15,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 721.0) internal successors, (4326), 6 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:15,883 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 134 flow. Second operand 5 states and 1685 transitions. [2023-08-04 01:59:15,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 127 transitions, 534 flow [2023-08-04 01:59:15,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 127 transitions, 527 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:59:15,924 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-04 01:59:15,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-04 01:59:15,926 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-04 01:59:15,926 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-04 01:59:15,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:15,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:59:15,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:59:15,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 01:59:16,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:16,134 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:59:16,134 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:59:16,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 01:59:16,327 INFO L124 PetriNetUnfolderBase]: 197/1360 cut-off events. [2023-08-04 01:59:16,328 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:59:16,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 1360 events. 197/1360 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8105 event pairs, 2 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 820. Up to 32 conditions per place. [2023-08-04 01:59:16,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 01:59:16,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 355 transitions, 758 flow [2023-08-04 01:59:16,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:59:16,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 355 transitions, 758 flow [2023-08-04 01:59:16,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 355 transitions, 758 flow [2023-08-04 01:59:16,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 355 transitions, 758 flow [2023-08-04 01:59:16,544 INFO L124 PetriNetUnfolderBase]: 197/1360 cut-off events. [2023-08-04 01:59:16,545 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:59:16,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 1360 events. 197/1360 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8105 event pairs, 2 based on Foata normal form. 0/1160 useless extension candidates. Maximal degree in co-relation 820. Up to 32 conditions per place. [2023-08-04 01:59:16,616 INFO L119 LiptonReduction]: Number of co-enabled transitions 48576 [2023-08-04 01:59:23,016 INFO L134 LiptonReduction]: Checked pairs total: 74167 [2023-08-04 01:59:23,016 INFO L136 LiptonReduction]: Total number of compositions: 371 [2023-08-04 01:59:23,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:59:23,018 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;@6292c2a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:59:23,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:59:23,021 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:59:23,021 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 01:59:23,021 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 01:59:23,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:23,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:23,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:59:23,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1751033368, now seen corresponding path program 1 times [2023-08-04 01:59:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:23,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302940798] [2023-08-04 01:59:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:59:23,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:23,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302940798] [2023-08-04 01:59:23,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302940798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:59:23,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:59:23,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 01:59:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749757483] [2023-08-04 01:59:23,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:59:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:59:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:59:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:59:23,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 726 [2023-08-04 01:59:23,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:23,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:23,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 726 [2023-08-04 01:59:23,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:33,403 INFO L124 PetriNetUnfolderBase]: 145992/185466 cut-off events. [2023-08-04 01:59:33,403 INFO L125 PetriNetUnfolderBase]: For 9546/9546 co-relation queries the response was YES. [2023-08-04 01:59:33,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373409 conditions, 185466 events. 145992/185466 cut-off events. For 9546/9546 co-relation queries the response was YES. Maximal size of possible extension queue 4008. Compared 1016196 event pairs, 77682 based on Foata normal form. 0/137642 useless extension candidates. Maximal degree in co-relation 64947. Up to 182470 conditions per place. [2023-08-04 01:59:34,144 INFO L140 encePairwiseOnDemand]: 722/726 looper letters, 70 selfloop transitions, 2 changer transitions 2/79 dead transitions. [2023-08-04 01:59:34,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 350 flow [2023-08-04 01:59:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:59:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:59:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1013 transitions. [2023-08-04 01:59:34,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46510560146923785 [2023-08-04 01:59:34,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1013 transitions. [2023-08-04 01:59:34,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1013 transitions. [2023-08-04 01:59:34,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:34,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1013 transitions. [2023-08-04 01:59:34,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:34,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:34,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:34,154 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 188 flow. Second operand 3 states and 1013 transitions. [2023-08-04 01:59:34,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 350 flow [2023-08-04 01:59:34,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 350 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:59:34,162 INFO L231 Difference]: Finished difference. Result has 63 places, 68 transitions, 186 flow [2023-08-04 01:59:34,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2023-08-04 01:59:34,163 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 01:59:34,163 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 186 flow [2023-08-04 01:59:34,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:34,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:34,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:34,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:59:34,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:59:34,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1177111899, now seen corresponding path program 1 times [2023-08-04 01:59:34,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:34,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186296183] [2023-08-04 01:59:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:34,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:59:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186296183] [2023-08-04 01:59:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186296183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:59:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073111281] [2023-08-04 01:59:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:34,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:34,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:59:34,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:59:34,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 01:59:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:34,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:59:34,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:59:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:59:34,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:59:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073111281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:59:34,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:59:34,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 01:59:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72005668] [2023-08-04 01:59:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:59:34,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:59:34,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:59:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:59:34,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 726 [2023-08-04 01:59:34,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:34,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:34,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 726 [2023-08-04 01:59:34,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:44,658 INFO L124 PetriNetUnfolderBase]: 145936/185370 cut-off events. [2023-08-04 01:59:44,659 INFO L125 PetriNetUnfolderBase]: For 8122/8122 co-relation queries the response was YES. [2023-08-04 01:59:45,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372777 conditions, 185370 events. 145936/185370 cut-off events. For 8122/8122 co-relation queries the response was YES. Maximal size of possible extension queue 4044. Compared 1014044 event pairs, 78730 based on Foata normal form. 0/137550 useless extension candidates. Maximal degree in co-relation 372707. Up to 180905 conditions per place. [2023-08-04 01:59:45,522 INFO L140 encePairwiseOnDemand]: 723/726 looper letters, 86 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 01:59:45,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 93 transitions, 412 flow [2023-08-04 01:59:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:59:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:59:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-08-04 01:59:45,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47153351698806245 [2023-08-04 01:59:45,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-08-04 01:59:45,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-08-04 01:59:45,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:45,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-08-04 01:59:45,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:45,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:45,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:45,530 INFO L175 Difference]: Start difference. First operand has 63 places, 68 transitions, 186 flow. Second operand 3 states and 1027 transitions. [2023-08-04 01:59:45,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 93 transitions, 412 flow [2023-08-04 01:59:45,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 93 transitions, 404 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 01:59:45,557 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 190 flow [2023-08-04 01:59:45,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-04 01:59:45,558 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 01:59:45,558 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 190 flow [2023-08-04 01:59:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:45,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:45,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:45,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 01:59:45,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:45,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:59:45,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1123681060, now seen corresponding path program 1 times [2023-08-04 01:59:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:45,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968845931] [2023-08-04 01:59:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:59:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968845931] [2023-08-04 01:59:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968845931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:59:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125425670] [2023-08-04 01:59:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:45,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:59:45,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:59:45,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 01:59:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:45,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:59:45,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:59:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:59:45,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:59:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125425670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:59:45,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:59:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 01:59:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469185663] [2023-08-04 01:59:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:59:45,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:59:45,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:59:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:59:45,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 726 [2023-08-04 01:59:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:45,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 726 [2023-08-04 01:59:45,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:59:52,701 INFO L124 PetriNetUnfolderBase]: 97638/126682 cut-off events. [2023-08-04 01:59:52,701 INFO L125 PetriNetUnfolderBase]: For 7888/7888 co-relation queries the response was YES. [2023-08-04 01:59:52,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260246 conditions, 126682 events. 97638/126682 cut-off events. For 7888/7888 co-relation queries the response was YES. Maximal size of possible extension queue 2493. Compared 710982 event pairs, 50129 based on Foata normal form. 0/97929 useless extension candidates. Maximal degree in co-relation 87064. Up to 89310 conditions per place. [2023-08-04 01:59:53,274 INFO L140 encePairwiseOnDemand]: 723/726 looper letters, 99 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 01:59:53,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 106 transitions, 476 flow [2023-08-04 01:59:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:59:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:59:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1039 transitions. [2023-08-04 01:59:53,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4770431588613407 [2023-08-04 01:59:53,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1039 transitions. [2023-08-04 01:59:53,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1039 transitions. [2023-08-04 01:59:53,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:59:53,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1039 transitions. [2023-08-04 01:59:53,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:53,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:53,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:53,282 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 190 flow. Second operand 3 states and 1039 transitions. [2023-08-04 01:59:53,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 106 transitions, 476 flow [2023-08-04 01:59:53,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 106 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:59:53,299 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 200 flow [2023-08-04 01:59:53,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 01:59:53,299 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 01:59:53,300 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 200 flow [2023-08-04 01:59:53,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:53,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:59:53,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:59:53,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 01:59:53,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:53,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:59:53,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:59:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1500759628, now seen corresponding path program 1 times [2023-08-04 01:59:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:59:53,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894203637] [2023-08-04 01:59:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:59:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:59:53,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:59:53,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894203637] [2023-08-04 01:59:53,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894203637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:59:53,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632073432] [2023-08-04 01:59:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:59:53,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:59:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:59:53,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:59:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 01:59:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:59:53,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:59:53,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:59:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:59:53,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:59:53,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632073432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:59:53,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:59:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 01:59:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294091897] [2023-08-04 01:59:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:59:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:59:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:59:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:59:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:59:53,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 726 [2023-08-04 01:59:53,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:59:53,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:59:53,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 726 [2023-08-04 01:59:53,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:00,157 INFO L124 PetriNetUnfolderBase]: 86106/111861 cut-off events. [2023-08-04 02:00:00,157 INFO L125 PetriNetUnfolderBase]: For 23436/23436 co-relation queries the response was YES. [2023-08-04 02:00:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238037 conditions, 111861 events. 86106/111861 cut-off events. For 23436/23436 co-relation queries the response was YES. Maximal size of possible extension queue 2320. Compared 613316 event pairs, 54993 based on Foata normal form. 0/88690 useless extension candidates. Maximal degree in co-relation 86883. Up to 95433 conditions per place. [2023-08-04 02:00:00,618 INFO L140 encePairwiseOnDemand]: 723/726 looper letters, 100 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 02:00:00,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 107 transitions, 488 flow [2023-08-04 02:00:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1039 transitions. [2023-08-04 02:00:00,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4770431588613407 [2023-08-04 02:00:00,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1039 transitions. [2023-08-04 02:00:00,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1039 transitions. [2023-08-04 02:00:00,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:00,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1039 transitions. [2023-08-04 02:00:00,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:00,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:00,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:00,626 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 200 flow. Second operand 3 states and 1039 transitions. [2023-08-04 02:00:00,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 107 transitions, 488 flow [2023-08-04 02:00:01,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:01,035 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 210 flow [2023-08-04 02:00:01,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-08-04 02:00:01,036 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 02:00:01,036 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 210 flow [2023-08-04 02:00:01,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:01,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:01,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:01,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:01,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:01,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2112491946, now seen corresponding path program 1 times [2023-08-04 02:00:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:01,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486857234] [2023-08-04 02:00:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:00:01,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486857234] [2023-08-04 02:00:01,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486857234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235612113] [2023-08-04 02:00:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:01,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:01,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:01,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:00:01,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:00:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:01,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:00:01,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:00:01,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:00:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235612113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:01,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:00:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198358344] [2023-08-04 02:00:01,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:01,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:01,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:00:01,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 726 [2023-08-04 02:00:01,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:01,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:01,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 726 [2023-08-04 02:00:01,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:07,321 INFO L124 PetriNetUnfolderBase]: 80447/104162 cut-off events. [2023-08-04 02:00:07,322 INFO L125 PetriNetUnfolderBase]: For 17683/17683 co-relation queries the response was YES. [2023-08-04 02:00:07,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222507 conditions, 104162 events. 80447/104162 cut-off events. For 17683/17683 co-relation queries the response was YES. Maximal size of possible extension queue 2256. Compared 562706 event pairs, 27332 based on Foata normal form. 7/82786 useless extension candidates. Maximal degree in co-relation 179392. Up to 101754 conditions per place. [2023-08-04 02:00:07,820 INFO L140 encePairwiseOnDemand]: 722/726 looper letters, 88 selfloop transitions, 3 changer transitions 1/97 dead transitions. [2023-08-04 02:00:07,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 446 flow [2023-08-04 02:00:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:00:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:00:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1338 transitions. [2023-08-04 02:00:07,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2023-08-04 02:00:07,823 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1338 transitions. [2023-08-04 02:00:07,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1338 transitions. [2023-08-04 02:00:07,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:07,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1338 transitions. [2023-08-04 02:00:07,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:07,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:07,988 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:07,988 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 210 flow. Second operand 4 states and 1338 transitions. [2023-08-04 02:00:07,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 446 flow [2023-08-04 02:00:09,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:09,168 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 222 flow [2023-08-04 02:00:09,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-04 02:00:09,168 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-08-04 02:00:09,169 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 222 flow [2023-08-04 02:00:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.8) internal successors, (1589), 5 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:09,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:09,169 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, 1, 1, 1, 1] [2023-08-04 02:00:09,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:09,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:09,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:09,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1319669436, now seen corresponding path program 1 times [2023-08-04 02:00:09,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:09,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826750250] [2023-08-04 02:00:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:09,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:00:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826750250] [2023-08-04 02:00:09,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826750250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169125974] [2023-08-04 02:00:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:09,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:09,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:09,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:00:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:00:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:09,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:00:09,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:00:09,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:00:09,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169125974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:09,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:09,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:00:09,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903531039] [2023-08-04 02:00:09,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:09,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:09,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:00:09,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 726 [2023-08-04 02:00:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:09,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 726 [2023-08-04 02:00:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:15,415 INFO L124 PetriNetUnfolderBase]: 77866/100976 cut-off events. [2023-08-04 02:00:15,416 INFO L125 PetriNetUnfolderBase]: For 9099/9099 co-relation queries the response was YES. [2023-08-04 02:00:15,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214980 conditions, 100976 events. 77866/100976 cut-off events. For 9099/9099 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 546025 event pairs, 23608 based on Foata normal form. 294/80715 useless extension candidates. Maximal degree in co-relation 172165. Up to 73454 conditions per place. [2023-08-04 02:00:15,890 INFO L140 encePairwiseOnDemand]: 722/726 looper letters, 118 selfloop transitions, 3 changer transitions 1/127 dead transitions. [2023-08-04 02:00:15,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 127 transitions, 578 flow [2023-08-04 02:00:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:00:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:00:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1368 transitions. [2023-08-04 02:00:15,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2023-08-04 02:00:15,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1368 transitions. [2023-08-04 02:00:15,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1368 transitions. [2023-08-04 02:00:15,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:15,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1368 transitions. [2023-08-04 02:00:15,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:15,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:15,899 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:15,899 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 222 flow. Second operand 4 states and 1368 transitions. [2023-08-04 02:00:15,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 127 transitions, 578 flow [2023-08-04 02:00:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 127 transitions, 569 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:00:17,454 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 227 flow [2023-08-04 02:00:17,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-04 02:00:17,455 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 02:00:17,455 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 227 flow [2023-08-04 02:00:17,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:17,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:17,456 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, 1, 1, 1, 1] [2023-08-04 02:00:17,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:17,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 02:00:17,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:17,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash -987475624, now seen corresponding path program 1 times [2023-08-04 02:00:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928185464] [2023-08-04 02:00:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:17,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:00:17,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:17,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928185464] [2023-08-04 02:00:17,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928185464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464613712] [2023-08-04 02:00:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:17,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:17,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:17,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:00:17,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:00:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:17,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:00:17,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:00:17,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:00:17,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464613712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:17,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:17,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:00:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199291124] [2023-08-04 02:00:17,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:17,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:17,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:00:17,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 726 [2023-08-04 02:00:17,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:17,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:17,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 726 [2023-08-04 02:00:17,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:22,107 INFO L124 PetriNetUnfolderBase]: 55820/72548 cut-off events. [2023-08-04 02:00:22,108 INFO L125 PetriNetUnfolderBase]: For 29156/29156 co-relation queries the response was YES. [2023-08-04 02:00:22,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161023 conditions, 72548 events. 55820/72548 cut-off events. For 29156/29156 co-relation queries the response was YES. Maximal size of possible extension queue 1719. Compared 383864 event pairs, 16190 based on Foata normal form. 1225/58783 useless extension candidates. Maximal degree in co-relation 155588. Up to 28889 conditions per place. [2023-08-04 02:00:22,486 INFO L140 encePairwiseOnDemand]: 722/726 looper letters, 130 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-08-04 02:00:22,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 139 transitions, 640 flow [2023-08-04 02:00:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:00:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:00:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2023-08-04 02:00:22,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2023-08-04 02:00:22,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2023-08-04 02:00:22,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2023-08-04 02:00:22,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:22,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2023-08-04 02:00:22,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:22,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:22,496 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:22,496 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 227 flow. Second operand 4 states and 1380 transitions. [2023-08-04 02:00:22,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 139 transitions, 640 flow [2023-08-04 02:00:22,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 139 transitions, 630 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:00:22,824 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 238 flow [2023-08-04 02:00:22,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-04 02:00:22,825 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-04 02:00:22,825 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 238 flow [2023-08-04 02:00:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.2) internal successors, (1591), 5 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:22,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:22,826 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, 1, 1, 1, 1] [2023-08-04 02:00:22,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:00:23,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:23,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:23,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2050757718, now seen corresponding path program 1 times [2023-08-04 02:00:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:23,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016153712] [2023-08-04 02:00:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:23,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:00:23,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:23,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016153712] [2023-08-04 02:00:23,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016153712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:23,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364856114] [2023-08-04 02:00:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:23,087 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:00:23,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:00:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:23,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:00:23,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:00:23,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:00:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364856114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:23,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:00:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354832732] [2023-08-04 02:00:23,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:00:23,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 726 [2023-08-04 02:00:23,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 318.8) internal successors, (1594), 5 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:23,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:23,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 726 [2023-08-04 02:00:23,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:27,814 INFO L124 PetriNetUnfolderBase]: 55727/72375 cut-off events. [2023-08-04 02:00:27,814 INFO L125 PetriNetUnfolderBase]: For 38086/38086 co-relation queries the response was YES. [2023-08-04 02:00:27,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166144 conditions, 72375 events. 55727/72375 cut-off events. For 38086/38086 co-relation queries the response was YES. Maximal size of possible extension queue 1719. Compared 380287 event pairs, 39753 based on Foata normal form. 28/57437 useless extension candidates. Maximal degree in co-relation 160803. Up to 68175 conditions per place. [2023-08-04 02:00:28,154 INFO L140 encePairwiseOnDemand]: 722/726 looper letters, 130 selfloop transitions, 3 changer transitions 2/140 dead transitions. [2023-08-04 02:00:28,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 140 transitions, 652 flow [2023-08-04 02:00:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:00:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:00:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2023-08-04 02:00:28,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2023-08-04 02:00:28,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2023-08-04 02:00:28,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2023-08-04 02:00:28,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:28,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2023-08-04 02:00:28,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:28,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:28,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 726.0) internal successors, (3630), 5 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:28,162 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 238 flow. Second operand 4 states and 1380 transitions. [2023-08-04 02:00:28,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 140 transitions, 652 flow [2023-08-04 02:00:28,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 140 transitions, 648 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:28,794 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 242 flow [2023-08-04 02:00:28,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2023-08-04 02:00:28,795 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 16 predicate places. [2023-08-04 02:00:28,795 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 242 flow [2023-08-04 02:00:28,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 318.8) internal successors, (1594), 5 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:28,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:28,796 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, 1, 1, 1, 1] [2023-08-04 02:00:28,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:29,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:00:29,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:29,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2017790164, now seen corresponding path program 1 times [2023-08-04 02:00:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:29,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921968381] [2023-08-04 02:00:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:00:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921968381] [2023-08-04 02:00:29,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921968381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:29,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975222822] [2023-08-04 02:00:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:29,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:29,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:00:29,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:00:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:29,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 02:00:29,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:00:30,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:00:30,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975222822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:30,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:30,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-04 02:00:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554048400] [2023-08-04 02:00:30,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:30,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:00:30,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:30,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:00:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:00:31,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 726 [2023-08-04 02:00:31,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 242 flow. Second operand has 17 states, 17 states have (on average 289.70588235294116) internal successors, (4925), 17 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:00:31,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:31,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 726 [2023-08-04 02:00:31,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:59,262 INFO L124 PetriNetUnfolderBase]: 306352/400587 cut-off events. [2023-08-04 02:00:59,262 INFO L125 PetriNetUnfolderBase]: For 195976/195976 co-relation queries the response was YES. [2023-08-04 02:01:00,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916055 conditions, 400587 events. 306352/400587 cut-off events. For 195976/195976 co-relation queries the response was YES. Maximal size of possible extension queue 8920. Compared 2632364 event pairs, 108649 based on Foata normal form. 2/318104 useless extension candidates. Maximal degree in co-relation 913351. Up to 69053 conditions per place. [2023-08-04 02:01:02,018 INFO L140 encePairwiseOnDemand]: 710/726 looper letters, 462 selfloop transitions, 37 changer transitions 8/512 dead transitions. [2023-08-04 02:01:02,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 512 transitions, 2843 flow [2023-08-04 02:01:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 02:01:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 02:01:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4736 transitions. [2023-08-04 02:01:02,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43489439853076217 [2023-08-04 02:01:02,026 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4736 transitions. [2023-08-04 02:01:02,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4736 transitions. [2023-08-04 02:01:02,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:02,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4736 transitions. [2023-08-04 02:01:02,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 315.73333333333335) internal successors, (4736), 15 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 726.0) internal successors, (11616), 16 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,045 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 726.0) internal successors, (11616), 16 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:02,045 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 242 flow. Second operand 15 states and 4736 transitions. [2023-08-04 02:01:02,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 512 transitions, 2843 flow [2023-08-04 02:01:37,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 512 transitions, 2777 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-04 02:01:37,522 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 534 flow [2023-08-04 02:01:37,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=534, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2023-08-04 02:01:37,523 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 40 predicate places. [2023-08-04 02:01:37,523 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 534 flow [2023-08-04 02:01:37,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 289.70588235294116) internal successors, (4925), 17 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:37,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:37,524 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, 1, 1, 1, 1, 1] [2023-08-04 02:01:37,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:37,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:01:37,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:37,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash 620009648, now seen corresponding path program 1 times [2023-08-04 02:01:37,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:37,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312613952] [2023-08-04 02:01:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:37,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:01:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312613952] [2023-08-04 02:01:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312613952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499761528] [2023-08-04 02:01:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:38,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:38,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:38,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:01:38,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:01:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:38,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 02:01:38,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:01:38,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:01:38,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499761528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:38,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:38,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-04 02:01:38,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220058795] [2023-08-04 02:01:38,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:38,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:01:38,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:38,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:01:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:01:39,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 726 [2023-08-04 02:01:39,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 534 flow. Second operand has 15 states, 15 states have (on average 288.0) internal successors, (4320), 15 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:39,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:39,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 726 [2023-08-04 02:01:39,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand