/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:34:54,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:34:55,030 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 07:34:55,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:34:55,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:34:55,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:34:55,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:34:55,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:34:55,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:34:55,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:34:55,067 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:34:55,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:34:55,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:34:55,069 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:34:55,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:34:55,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:34:55,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:34:55,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:34:55,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:34:55,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:34:55,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:34:55,073 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:34:55,073 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:34:55,073 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:34:55,074 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:34:55,074 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:34:55,074 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:34:55,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:34:55,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:34:55,075 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:34:55,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:34:55,076 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:34:55,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:34:55,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:34:55,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:34:55,077 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:34:55,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:34:55,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:34:55,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:34:55,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:34:55,408 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:34:55,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-27 07:34:56,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:34:56,902 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:34:56,902 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-27 07:34:56,913 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535976c9e/201af8bed4f04916a6c8479ab3a3c61d/FLAG93b261c07 [2023-08-27 07:34:56,926 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535976c9e/201af8bed4f04916a6c8479ab3a3c61d [2023-08-27 07:34:56,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:34:56,931 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:34:56,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:34:56,934 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:34:56,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:34:56,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:34:56" (1/1) ... [2023-08-27 07:34:56,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b912a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:56, skipping insertion in model container [2023-08-27 07:34:56,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:34:56" (1/1) ... [2023-08-27 07:34:56,966 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:34:57,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:34:57,176 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:34:57,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:34:57,222 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:34:57,222 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:34:57,230 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:34:57,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57 WrapperNode [2023-08-27 07:34:57,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:34:57,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:34:57,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:34:57,232 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:34:57,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,274 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 283 [2023-08-27 07:34:57,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:34:57,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:34:57,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:34:57,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:34:57,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:34:57,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:34:57,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:34:57,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:34:57,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (1/1) ... [2023-08-27 07:34:57,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:34:57,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:57,356 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) [2023-08-27 07:34:57,384 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 [2023-08-27 07:34:57,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:34:57,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:34:57,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:34:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:34:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:34:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:34:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:34:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 07:34:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:34:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:34:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:34:57,407 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 07:34:57,497 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:34:57,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:34:57,853 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:34:58,042 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:34:58,043 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-27 07:34:58,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:58 BoogieIcfgContainer [2023-08-27 07:34:58,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:34:58,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:34:58,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:34:58,050 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:34:58,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:34:56" (1/3) ... [2023-08-27 07:34:58,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbace21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:34:58, skipping insertion in model container [2023-08-27 07:34:58,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:57" (2/3) ... [2023-08-27 07:34:58,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbace21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:34:58, skipping insertion in model container [2023-08-27 07:34:58,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:58" (3/3) ... [2023-08-27 07:34:58,052 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-27 07:34:58,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:34:58,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-27 07:34:58,064 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:34:58,151 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 07:34:58,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 514 flow [2023-08-27 07:34:58,276 INFO L124 PetriNetUnfolderBase]: 18/242 cut-off events. [2023-08-27 07:34:58,277 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:34:58,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 18/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 191. Up to 3 conditions per place. [2023-08-27 07:34:58,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 245 transitions, 514 flow [2023-08-27 07:34:58,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 231 transitions, 480 flow [2023-08-27 07:34:58,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:34:58,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 231 transitions, 480 flow [2023-08-27 07:34:58,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 231 transitions, 480 flow [2023-08-27 07:34:58,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 231 transitions, 480 flow [2023-08-27 07:34:58,360 INFO L124 PetriNetUnfolderBase]: 18/231 cut-off events. [2023-08-27 07:34:58,360 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:34:58,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 231 events. 18/231 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 240 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 191. Up to 3 conditions per place. [2023-08-27 07:34:58,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 3544 [2023-08-27 07:35:06,147 INFO L134 LiptonReduction]: Checked pairs total: 7988 [2023-08-27 07:35:06,147 INFO L136 LiptonReduction]: Total number of compositions: 241 [2023-08-27 07:35:06,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:35:06,163 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=false, 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;@646da39d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:35:06,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-27 07:35:06,165 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:35:06,165 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 07:35:06,165 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 07:35:06,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:06,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 07:35:06,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:06,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 35989, now seen corresponding path program 1 times [2023-08-27 07:35:06,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:06,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150573899] [2023-08-27 07:35:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:06,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:06,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:06,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150573899] [2023-08-27 07:35:06,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150573899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:06,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:06,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:35:06,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398154358] [2023-08-27 07:35:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:06,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:06,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:35:06,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 486 [2023-08-27 07:35:06,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:06,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:06,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 486 [2023-08-27 07:35:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:07,115 INFO L124 PetriNetUnfolderBase]: 3883/5024 cut-off events. [2023-08-27 07:35:07,115 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-08-27 07:35:07,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10247 conditions, 5024 events. 3883/5024 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 22846 event pairs, 2117 based on Foata normal form. 0/1594 useless extension candidates. Maximal degree in co-relation 9165. Up to 4993 conditions per place. [2023-08-27 07:35:07,144 INFO L140 encePairwiseOnDemand]: 471/486 looper letters, 44 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-08-27 07:35:07,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 220 flow [2023-08-27 07:35:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-27 07:35:07,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355281207133059 [2023-08-27 07:35:07,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-27 07:35:07,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-27 07:35:07,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:07,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-27 07:35:07,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,172 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 635 transitions. [2023-08-27 07:35:07,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 220 flow [2023-08-27 07:35:07,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 07:35:07,181 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 146 flow [2023-08-27 07:35:07,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-27 07:35:07,185 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2023-08-27 07:35:07,186 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 146 flow [2023-08-27 07:35:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:07,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:35:07,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:35:07,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:07,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1117827, now seen corresponding path program 1 times [2023-08-27 07:35:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927640023] [2023-08-27 07:35:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:07,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:07,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927640023] [2023-08-27 07:35:07,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927640023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:07,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:07,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:35:07,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120921054] [2023-08-27 07:35:07,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:07,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:07,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:35:07,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 486 [2023-08-27 07:35:07,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:07,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 486 [2023-08-27 07:35:07,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:07,792 INFO L124 PetriNetUnfolderBase]: 3883/5022 cut-off events. [2023-08-27 07:35:07,793 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-27 07:35:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10113 conditions, 5022 events. 3883/5022 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 22810 event pairs, 2117 based on Foata normal form. 0/1596 useless extension candidates. Maximal degree in co-relation 10071. Up to 4985 conditions per place. [2023-08-27 07:35:07,821 INFO L140 encePairwiseOnDemand]: 482/486 looper letters, 44 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-27 07:35:07,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 232 flow [2023-08-27 07:35:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-27 07:35:07,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-08-27 07:35:07,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-27 07:35:07,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-27 07:35:07,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:07,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-27 07:35:07,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,830 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 146 flow. Second operand 3 states and 621 transitions. [2023-08-27 07:35:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 232 flow [2023-08-27 07:35:07,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:35:07,832 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 134 flow [2023-08-27 07:35:07,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-27 07:35:07,833 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -9 predicate places. [2023-08-27 07:35:07,833 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 134 flow [2023-08-27 07:35:07,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:07,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:07,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:35:07,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 07:35:07,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:07,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1117839, now seen corresponding path program 1 times [2023-08-27 07:35:07,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:07,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590431744] [2023-08-27 07:35:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:07,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590431744] [2023-08-27 07:35:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590431744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787079748] [2023-08-27 07:35:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:07,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:07,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:07,913 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) [2023-08-27 07:35:07,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 07:35:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:08,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:35:08,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:08,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787079748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:08,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:08,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 07:35:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342220288] [2023-08-27 07:35:08,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:08,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:35:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:35:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:35:08,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 486 [2023-08-27 07:35:08,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 193.14285714285714) internal successors, (1352), 7 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:08,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:08,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 486 [2023-08-27 07:35:08,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:08,663 INFO L124 PetriNetUnfolderBase]: 3889/5034 cut-off events. [2023-08-27 07:35:08,663 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-27 07:35:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10150 conditions, 5034 events. 3889/5034 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 22975 event pairs, 2117 based on Foata normal form. 0/1605 useless extension candidates. Maximal degree in co-relation 10071. Up to 4994 conditions per place. [2023-08-27 07:35:08,690 INFO L140 encePairwiseOnDemand]: 479/486 looper letters, 42 selfloop transitions, 17 changer transitions 0/62 dead transitions. [2023-08-27 07:35:08,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 306 flow [2023-08-27 07:35:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:35:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:35:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1217 transitions. [2023-08-27 07:35:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173525377229081 [2023-08-27 07:35:08,694 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1217 transitions. [2023-08-27 07:35:08,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1217 transitions. [2023-08-27 07:35:08,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:08,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1217 transitions. [2023-08-27 07:35:08,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.83333333333334) internal successors, (1217), 6 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:08,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:08,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:08,704 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 134 flow. Second operand 6 states and 1217 transitions. [2023-08-27 07:35:08,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 306 flow [2023-08-27 07:35:08,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:35:08,706 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 246 flow [2023-08-27 07:35:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-08-27 07:35:08,707 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-27 07:35:08,707 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 246 flow [2023-08-27 07:35:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.14285714285714) internal successors, (1352), 7 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:08,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:08,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 07:35:08,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:08,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:08,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:08,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1056401375, now seen corresponding path program 2 times [2023-08-27 07:35:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285256735] [2023-08-27 07:35:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285256735] [2023-08-27 07:35:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285256735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038688488] [2023-08-27 07:35:09,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:35:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:09,043 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) [2023-08-27 07:35:09,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 07:35:09,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:35:09,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:09,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:35:09,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 07:35:09,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:35:09,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038688488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:09,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:35:09,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 07:35:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687216579] [2023-08-27 07:35:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:35:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 486 [2023-08-27 07:35:09,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:09,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 486 [2023-08-27 07:35:09,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:09,653 INFO L124 PetriNetUnfolderBase]: 3889/5032 cut-off events. [2023-08-27 07:35:09,653 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 07:35:09,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10173 conditions, 5032 events. 3889/5032 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 22954 event pairs, 2117 based on Foata normal form. 2/1608 useless extension candidates. Maximal degree in co-relation 10120. Up to 5003 conditions per place. [2023-08-27 07:35:09,683 INFO L140 encePairwiseOnDemand]: 483/486 looper letters, 56 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-27 07:35:09,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 340 flow [2023-08-27 07:35:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-27 07:35:09,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4286694101508916 [2023-08-27 07:35:09,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-27 07:35:09,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-27 07:35:09,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:09,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-27 07:35:09,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,734 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 246 flow. Second operand 3 states and 625 transitions. [2023-08-27 07:35:09,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 340 flow [2023-08-27 07:35:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 60 transitions, 282 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-27 07:35:09,736 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 170 flow [2023-08-27 07:35:09,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-08-27 07:35:09,737 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2023-08-27 07:35:09,737 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 170 flow [2023-08-27 07:35:09,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:09,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 07:35:09,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:09,943 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 [2023-08-27 07:35:09,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:09,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1051844958, now seen corresponding path program 1 times [2023-08-27 07:35:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:09,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133261166] [2023-08-27 07:35:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:09,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133261166] [2023-08-27 07:35:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133261166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:10,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:35:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96756543] [2023-08-27 07:35:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:35:10,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 486 [2023-08-27 07:35:10,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:10,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:10,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 486 [2023-08-27 07:35:10,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:10,562 INFO L124 PetriNetUnfolderBase]: 4367/5794 cut-off events. [2023-08-27 07:35:10,562 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-27 07:35:10,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11689 conditions, 5794 events. 4367/5794 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 28707 event pairs, 2125 based on Foata normal form. 0/2074 useless extension candidates. Maximal degree in co-relation 11681. Up to 4618 conditions per place. [2023-08-27 07:35:10,590 INFO L140 encePairwiseOnDemand]: 480/486 looper letters, 77 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-27 07:35:10,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 380 flow [2023-08-27 07:35:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-27 07:35:10,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615912208504801 [2023-08-27 07:35:10,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-27 07:35:10,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-27 07:35:10,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:10,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-27 07:35:10,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:10,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:10,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:10,598 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 170 flow. Second operand 3 states and 673 transitions. [2023-08-27 07:35:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 380 flow [2023-08-27 07:35:10,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:10,602 INFO L231 Difference]: Finished difference. Result has 52 places, 63 transitions, 197 flow [2023-08-27 07:35:10,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=52, PETRI_TRANSITIONS=63} [2023-08-27 07:35:10,603 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2023-08-27 07:35:10,604 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 63 transitions, 197 flow [2023-08-27 07:35:10,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:10,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:10,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:10,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 07:35:10,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:10,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1752547211, now seen corresponding path program 1 times [2023-08-27 07:35:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:10,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201985419] [2023-08-27 07:35:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:10,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:10,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201985419] [2023-08-27 07:35:10,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201985419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:10,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:10,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:35:10,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646866858] [2023-08-27 07:35:10,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:10,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:35:10,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:35:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:35:10,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 486 [2023-08-27 07:35:10,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 63 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:10,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:10,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 486 [2023-08-27 07:35:10,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:11,233 INFO L124 PetriNetUnfolderBase]: 3905/5215 cut-off events. [2023-08-27 07:35:11,233 INFO L125 PetriNetUnfolderBase]: For 299/449 co-relation queries the response was YES. [2023-08-27 07:35:11,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12045 conditions, 5215 events. 3905/5215 cut-off events. For 299/449 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 25628 event pairs, 2415 based on Foata normal form. 190/2256 useless extension candidates. Maximal degree in co-relation 12036. Up to 5145 conditions per place. [2023-08-27 07:35:11,253 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 77 selfloop transitions, 3 changer transitions 1/84 dead transitions. [2023-08-27 07:35:11,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 424 flow [2023-08-27 07:35:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:35:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:35:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2023-08-27 07:35:11,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2023-08-27 07:35:11,256 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2023-08-27 07:35:11,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2023-08-27 07:35:11,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:11,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2023-08-27 07:35:11,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:11,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:11,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:11,262 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 197 flow. Second operand 4 states and 786 transitions. [2023-08-27 07:35:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 424 flow [2023-08-27 07:35:11,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:11,264 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 212 flow [2023-08-27 07:35:11,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2023-08-27 07:35:11,266 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-27 07:35:11,266 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 212 flow [2023-08-27 07:35:11,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:11,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:11,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 07:35:11,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:11,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:11,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1448132003, now seen corresponding path program 1 times [2023-08-27 07:35:11,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:11,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556918482] [2023-08-27 07:35:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:11,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:11,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:11,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556918482] [2023-08-27 07:35:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556918482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:11,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998508621] [2023-08-27 07:35:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:11,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:11,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:11,383 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) [2023-08-27 07:35:11,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 07:35:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:11,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 07:35:11,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:11,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998508621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:11,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:11,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-27 07:35:11,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721544727] [2023-08-27 07:35:11,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 07:35:11,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 07:35:11,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 07:35:11,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 486 [2023-08-27 07:35:11,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 212 flow. Second operand has 12 states, 12 states have (on average 180.41666666666666) internal successors, (2165), 12 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:11,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:11,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 486 [2023-08-27 07:35:11,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:12,537 INFO L124 PetriNetUnfolderBase]: 4998/6826 cut-off events. [2023-08-27 07:35:12,538 INFO L125 PetriNetUnfolderBase]: For 1780/2056 co-relation queries the response was YES. [2023-08-27 07:35:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16221 conditions, 6826 events. 4998/6826 cut-off events. For 1780/2056 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 36671 event pairs, 2538 based on Foata normal form. 771/3513 useless extension candidates. Maximal degree in co-relation 16210. Up to 5143 conditions per place. [2023-08-27 07:35:12,568 INFO L140 encePairwiseOnDemand]: 473/486 looper letters, 128 selfloop transitions, 20 changer transitions 1/152 dead transitions. [2023-08-27 07:35:12,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 152 transitions, 754 flow [2023-08-27 07:35:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 07:35:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 07:35:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2285 transitions. [2023-08-27 07:35:12,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391803840877915 [2023-08-27 07:35:12,576 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2285 transitions. [2023-08-27 07:35:12,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2285 transitions. [2023-08-27 07:35:12,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:12,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2285 transitions. [2023-08-27 07:35:12,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:12,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 486.0) internal successors, (6318), 13 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:12,593 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 486.0) internal successors, (6318), 13 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:12,593 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 212 flow. Second operand 12 states and 2285 transitions. [2023-08-27 07:35:12,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 152 transitions, 754 flow [2023-08-27 07:35:12,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 152 transitions, 748 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:12,597 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 377 flow [2023-08-27 07:35:12,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-27 07:35:12,597 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-27 07:35:12,597 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 377 flow [2023-08-27 07:35:12,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 180.41666666666666) internal successors, (2165), 12 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:12,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:12,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:12,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 07:35:12,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:12,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:12,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1884939829, now seen corresponding path program 2 times [2023-08-27 07:35:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:12,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677543276] [2023-08-27 07:35:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:12,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:12,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:12,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677543276] [2023-08-27 07:35:12,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677543276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:12,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364062975] [2023-08-27 07:35:12,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:35:12,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:12,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:12,955 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) [2023-08-27 07:35:12,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 07:35:13,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:35:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:13,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:35:13,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:35:13,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:35:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364062975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:13,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:35:13,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 07:35:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213470528] [2023-08-27 07:35:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:35:13,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 486 [2023-08-27 07:35:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 377 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:13,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 486 [2023-08-27 07:35:13,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:13,539 INFO L124 PetriNetUnfolderBase]: 3329/4649 cut-off events. [2023-08-27 07:35:13,540 INFO L125 PetriNetUnfolderBase]: For 6427/6687 co-relation queries the response was YES. [2023-08-27 07:35:13,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12101 conditions, 4649 events. 3329/4649 cut-off events. For 6427/6687 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 24586 event pairs, 2047 based on Foata normal form. 664/2561 useless extension candidates. Maximal degree in co-relation 12084. Up to 4626 conditions per place. [2023-08-27 07:35:13,558 INFO L140 encePairwiseOnDemand]: 482/486 looper letters, 70 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-27 07:35:13,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 483 flow [2023-08-27 07:35:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-08-27 07:35:13,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4499314128943759 [2023-08-27 07:35:13,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-08-27 07:35:13,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-08-27 07:35:13,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:13,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-08-27 07:35:13,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:13,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:13,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:13,565 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 377 flow. Second operand 3 states and 656 transitions. [2023-08-27 07:35:13,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 483 flow [2023-08-27 07:35:13,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 74 transitions, 464 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:13,573 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 324 flow [2023-08-27 07:35:13,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2023-08-27 07:35:13,574 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-08-27 07:35:13,574 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 324 flow [2023-08-27 07:35:13,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:13,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:13,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:13,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:13,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:13,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:13,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1884939843, now seen corresponding path program 1 times [2023-08-27 07:35:13,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:13,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137974982] [2023-08-27 07:35:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:35:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:13,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137974982] [2023-08-27 07:35:13,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137974982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:13,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:13,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:35:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338135059] [2023-08-27 07:35:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:13,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:35:13,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 486 [2023-08-27 07:35:13,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:13,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:13,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 486 [2023-08-27 07:35:13,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:14,222 INFO L124 PetriNetUnfolderBase]: 3791/5252 cut-off events. [2023-08-27 07:35:14,222 INFO L125 PetriNetUnfolderBase]: For 3104/3104 co-relation queries the response was YES. [2023-08-27 07:35:14,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13264 conditions, 5252 events. 3791/5252 cut-off events. For 3104/3104 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 27872 event pairs, 1224 based on Foata normal form. 0/2493 useless extension candidates. Maximal degree in co-relation 13246. Up to 2643 conditions per place. [2023-08-27 07:35:14,276 INFO L140 encePairwiseOnDemand]: 483/486 looper letters, 86 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-08-27 07:35:14,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 546 flow [2023-08-27 07:35:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2023-08-27 07:35:14,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4547325102880658 [2023-08-27 07:35:14,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2023-08-27 07:35:14,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2023-08-27 07:35:14,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:14,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2023-08-27 07:35:14,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:14,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:14,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:14,283 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 324 flow. Second operand 3 states and 663 transitions. [2023-08-27 07:35:14,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 546 flow [2023-08-27 07:35:14,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 545 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:14,305 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 325 flow [2023-08-27 07:35:14,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-27 07:35:14,306 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-08-27 07:35:14,306 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 325 flow [2023-08-27 07:35:14,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:14,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:14,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:14,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 07:35:14,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:14,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1884939793, now seen corresponding path program 1 times [2023-08-27 07:35:14,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:14,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772374128] [2023-08-27 07:35:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:14,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:35:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772374128] [2023-08-27 07:35:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772374128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843018827] [2023-08-27 07:35:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:14,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:14,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:14,352 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) [2023-08-27 07:35:14,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 07:35:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:14,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:35:14,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:35:14,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:35:14,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843018827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:14,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:14,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 07:35:14,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033239227] [2023-08-27 07:35:14,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:14,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:35:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:35:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:35:14,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 486 [2023-08-27 07:35:14,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 203.85714285714286) internal successors, (1427), 7 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:14,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:14,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 486 [2023-08-27 07:35:14,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:15,096 INFO L124 PetriNetUnfolderBase]: 5287/7132 cut-off events. [2023-08-27 07:35:15,096 INFO L125 PetriNetUnfolderBase]: For 4230/4230 co-relation queries the response was YES. [2023-08-27 07:35:15,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19652 conditions, 7132 events. 5287/7132 cut-off events. For 4230/4230 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 37200 event pairs, 1622 based on Foata normal form. 0/3833 useless extension candidates. Maximal degree in co-relation 19634. Up to 4140 conditions per place. [2023-08-27 07:35:15,123 INFO L140 encePairwiseOnDemand]: 482/486 looper letters, 139 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2023-08-27 07:35:15,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 152 transitions, 841 flow [2023-08-27 07:35:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:35:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:35:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1333 transitions. [2023-08-27 07:35:15,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45713305898491086 [2023-08-27 07:35:15,128 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1333 transitions. [2023-08-27 07:35:15,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1333 transitions. [2023-08-27 07:35:15,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:15,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1333 transitions. [2023-08-27 07:35:15,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.16666666666666) internal successors, (1333), 6 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,136 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,136 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 325 flow. Second operand 6 states and 1333 transitions. [2023-08-27 07:35:15,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 152 transitions, 841 flow [2023-08-27 07:35:15,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 827 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:35:15,159 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 395 flow [2023-08-27 07:35:15,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2023-08-27 07:35:15,160 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-27 07:35:15,160 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 395 flow [2023-08-27 07:35:15,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.85714285714286) internal successors, (1427), 7 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:15,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:15,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 07:35:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 07:35:15,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:15,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash 143706638, now seen corresponding path program 1 times [2023-08-27 07:35:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919834349] [2023-08-27 07:35:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:15,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:15,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919834349] [2023-08-27 07:35:15,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919834349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:15,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:15,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:35:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152454668] [2023-08-27 07:35:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:15,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:35:15,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 486 [2023-08-27 07:35:15,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:15,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 486 [2023-08-27 07:35:15,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:16,198 INFO L124 PetriNetUnfolderBase]: 7148/9549 cut-off events. [2023-08-27 07:35:16,199 INFO L125 PetriNetUnfolderBase]: For 20602/21404 co-relation queries the response was YES. [2023-08-27 07:35:16,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28747 conditions, 9549 events. 7148/9549 cut-off events. For 20602/21404 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 50093 event pairs, 1720 based on Foata normal form. 802/5474 useless extension candidates. Maximal degree in co-relation 28726. Up to 5689 conditions per place. [2023-08-27 07:35:16,244 INFO L140 encePairwiseOnDemand]: 482/486 looper letters, 101 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-08-27 07:35:16,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 750 flow [2023-08-27 07:35:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2023-08-27 07:35:16,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453360768175583 [2023-08-27 07:35:16,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2023-08-27 07:35:16,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2023-08-27 07:35:16,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:16,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2023-08-27 07:35:16,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:16,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:16,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:16,251 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 395 flow. Second operand 3 states and 661 transitions. [2023-08-27 07:35:16,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 750 flow [2023-08-27 07:35:16,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 691 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:16,259 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 383 flow [2023-08-27 07:35:16,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2023-08-27 07:35:16,259 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-08-27 07:35:16,260 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 383 flow [2023-08-27 07:35:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:16,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:16,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 07:35:16,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:16,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash 143706739, now seen corresponding path program 1 times [2023-08-27 07:35:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360417678] [2023-08-27 07:35:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:16,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:16,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360417678] [2023-08-27 07:35:16,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360417678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:16,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:16,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 07:35:16,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740615487] [2023-08-27 07:35:16,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:16,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:35:16,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:16,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:35:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:35:16,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 486 [2023-08-27 07:35:16,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:16,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:16,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 486 [2023-08-27 07:35:16,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:17,094 INFO L124 PetriNetUnfolderBase]: 7293/9834 cut-off events. [2023-08-27 07:35:17,094 INFO L125 PetriNetUnfolderBase]: For 14727/15575 co-relation queries the response was YES. [2023-08-27 07:35:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28328 conditions, 9834 events. 7293/9834 cut-off events. For 14727/15575 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 51182 event pairs, 4254 based on Foata normal form. 984/6453 useless extension candidates. Maximal degree in co-relation 28304. Up to 9513 conditions per place. [2023-08-27 07:35:17,128 INFO L140 encePairwiseOnDemand]: 471/486 looper letters, 80 selfloop transitions, 9 changer transitions 12/104 dead transitions. [2023-08-27 07:35:17,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 713 flow [2023-08-27 07:35:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:35:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:35:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2023-08-27 07:35:17,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2023-08-27 07:35:17,130 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2023-08-27 07:35:17,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2023-08-27 07:35:17,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:17,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2023-08-27 07:35:17,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,135 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,135 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 383 flow. Second operand 4 states and 786 transitions. [2023-08-27 07:35:17,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 713 flow [2023-08-27 07:35:17,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:17,156 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 413 flow [2023-08-27 07:35:17,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-27 07:35:17,157 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2023-08-27 07:35:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 413 flow [2023-08-27 07:35:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:17,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:17,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 07:35:17,158 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:17,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 458491989, now seen corresponding path program 1 times [2023-08-27 07:35:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:17,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330354914] [2023-08-27 07:35:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:17,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:35:17,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:17,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330354914] [2023-08-27 07:35:17,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330354914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:17,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:17,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:35:17,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070089127] [2023-08-27 07:35:17,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:35:17,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 486 [2023-08-27 07:35:17,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:17,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 486 [2023-08-27 07:35:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:17,875 INFO L124 PetriNetUnfolderBase]: 6211/8318 cut-off events. [2023-08-27 07:35:17,875 INFO L125 PetriNetUnfolderBase]: For 8187/8273 co-relation queries the response was YES. [2023-08-27 07:35:17,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 8318 events. 6211/8318 cut-off events. For 8187/8273 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 42298 event pairs, 1178 based on Foata normal form. 113/4677 useless extension candidates. Maximal degree in co-relation 27241. Up to 8187 conditions per place. [2023-08-27 07:35:17,903 INFO L140 encePairwiseOnDemand]: 482/486 looper letters, 80 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-08-27 07:35:17,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 88 transitions, 609 flow [2023-08-27 07:35:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-27 07:35:17,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540466392318244 [2023-08-27 07:35:17,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-27 07:35:17,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-27 07:35:17,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:17,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-27 07:35:17,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,908 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 413 flow. Second operand 3 states and 662 transitions. [2023-08-27 07:35:17,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 88 transitions, 609 flow [2023-08-27 07:35:17,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 584 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-27 07:35:17,927 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 399 flow [2023-08-27 07:35:17,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=399, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-27 07:35:17,928 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 19 predicate places. [2023-08-27 07:35:17,928 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 399 flow [2023-08-27 07:35:17,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:17,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:17,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 07:35:17,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:17,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash 526472142, now seen corresponding path program 1 times [2023-08-27 07:35:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:17,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322620725] [2023-08-27 07:35:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:17,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:18,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322620725] [2023-08-27 07:35:18,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322620725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:18,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:35:18,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:35:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500852135] [2023-08-27 07:35:18,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:18,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:35:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:18,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:35:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:35:18,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 486 [2023-08-27 07:35:18,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:18,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 486 [2023-08-27 07:35:18,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:18,520 INFO L124 PetriNetUnfolderBase]: 4195/5797 cut-off events. [2023-08-27 07:35:18,520 INFO L125 PetriNetUnfolderBase]: For 6600/6632 co-relation queries the response was YES. [2023-08-27 07:35:18,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19149 conditions, 5797 events. 4195/5797 cut-off events. For 6600/6632 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 27057 event pairs, 902 based on Foata normal form. 136/3456 useless extension candidates. Maximal degree in co-relation 19124. Up to 4999 conditions per place. [2023-08-27 07:35:18,543 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 83 selfloop transitions, 4 changer transitions 7/97 dead transitions. [2023-08-27 07:35:18,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 681 flow [2023-08-27 07:35:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2023-08-27 07:35:18,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45267489711934156 [2023-08-27 07:35:18,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2023-08-27 07:35:18,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2023-08-27 07:35:18,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:18,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2023-08-27 07:35:18,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,550 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 399 flow. Second operand 3 states and 660 transitions. [2023-08-27 07:35:18,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 681 flow [2023-08-27 07:35:18,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 663 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 07:35:18,559 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 368 flow [2023-08-27 07:35:18,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-27 07:35:18,560 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2023-08-27 07:35:18,560 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 368 flow [2023-08-27 07:35:18,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:18,560 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:18,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 07:35:18,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:18,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1837925548, now seen corresponding path program 2 times [2023-08-27 07:35:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118897068] [2023-08-27 07:35:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:35:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118897068] [2023-08-27 07:35:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118897068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541887930] [2023-08-27 07:35:18,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:35:18,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:18,688 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) [2023-08-27 07:35:18,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 07:35:18,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:35:18,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:18,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:35:18,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-27 07:35:18,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:35:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541887930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:18,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:35:18,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-08-27 07:35:18,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992698338] [2023-08-27 07:35:18,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:18,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:18,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:35:18,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 486 [2023-08-27 07:35:18,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:18,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 486 [2023-08-27 07:35:18,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:19,304 INFO L124 PetriNetUnfolderBase]: 3770/5199 cut-off events. [2023-08-27 07:35:19,304 INFO L125 PetriNetUnfolderBase]: For 5826/5850 co-relation queries the response was YES. [2023-08-27 07:35:19,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18335 conditions, 5199 events. 3770/5199 cut-off events. For 5826/5850 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 23882 event pairs, 1895 based on Foata normal form. 182/3288 useless extension candidates. Maximal degree in co-relation 18309. Up to 5168 conditions per place. [2023-08-27 07:35:19,327 INFO L140 encePairwiseOnDemand]: 484/486 looper letters, 66 selfloop transitions, 1 changer transitions 1/71 dead transitions. [2023-08-27 07:35:19,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 492 flow [2023-08-27 07:35:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-27 07:35:19,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430727023319616 [2023-08-27 07:35:19,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-27 07:35:19,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-27 07:35:19,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:19,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-27 07:35:19,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:19,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:19,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:19,332 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 368 flow. Second operand 3 states and 646 transitions. [2023-08-27 07:35:19,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 492 flow [2023-08-27 07:35:19,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 458 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-27 07:35:19,338 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 317 flow [2023-08-27 07:35:19,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2023-08-27 07:35:19,339 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2023-08-27 07:35:19,339 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 317 flow [2023-08-27 07:35:19,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:19,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:19,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:19,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 07:35:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 07:35:19,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:19,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1394274222, now seen corresponding path program 1 times [2023-08-27 07:35:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632845070] [2023-08-27 07:35:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:20,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632845070] [2023-08-27 07:35:20,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632845070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452260390] [2023-08-27 07:35:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:20,008 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) [2023-08-27 07:35:20,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 07:35:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:20,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 07:35:20,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:20,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 07:35:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:20,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:20,419 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:20,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-27 07:35:20,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-27 07:35:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:20,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452260390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:20,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:20,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-27 07:35:20,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909333348] [2023-08-27 07:35:20,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:20,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:35:20,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:20,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:35:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=277, Unknown=4, NotChecked=0, Total=342 [2023-08-27 07:35:20,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 486 [2023-08-27 07:35:20,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 317 flow. Second operand has 19 states, 19 states have (on average 152.78947368421052) internal successors, (2903), 19 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:20,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:20,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 486 [2023-08-27 07:35:20,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:22,388 INFO L124 PetriNetUnfolderBase]: 4661/6472 cut-off events. [2023-08-27 07:35:22,388 INFO L125 PetriNetUnfolderBase]: For 2636/2663 co-relation queries the response was YES. [2023-08-27 07:35:22,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21049 conditions, 6472 events. 4661/6472 cut-off events. For 2636/2663 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 32159 event pairs, 434 based on Foata normal form. 27/3855 useless extension candidates. Maximal degree in co-relation 21030. Up to 3005 conditions per place. [2023-08-27 07:35:22,432 INFO L140 encePairwiseOnDemand]: 471/486 looper letters, 247 selfloop transitions, 52 changer transitions 0/301 dead transitions. [2023-08-27 07:35:22,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 301 transitions, 1816 flow [2023-08-27 07:35:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 07:35:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 07:35:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3265 transitions. [2023-08-27 07:35:22,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359053497942387 [2023-08-27 07:35:22,440 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3265 transitions. [2023-08-27 07:35:22,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3265 transitions. [2023-08-27 07:35:22,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:22,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3265 transitions. [2023-08-27 07:35:22,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 163.25) internal successors, (3265), 20 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:22,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 486.0) internal successors, (10206), 21 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:22,459 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 486.0) internal successors, (10206), 21 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:22,460 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 317 flow. Second operand 20 states and 3265 transitions. [2023-08-27 07:35:22,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 301 transitions, 1816 flow [2023-08-27 07:35:22,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 301 transitions, 1815 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:22,475 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 705 flow [2023-08-27 07:35:22,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=705, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2023-08-27 07:35:22,477 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 36 predicate places. [2023-08-27 07:35:22,477 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 705 flow [2023-08-27 07:35:22,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 152.78947368421052) internal successors, (2903), 19 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:22,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:22,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:22,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:22,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:22,685 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:22,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash 869666245, now seen corresponding path program 1 times [2023-08-27 07:35:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:22,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779107612] [2023-08-27 07:35:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:22,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:22,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779107612] [2023-08-27 07:35:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779107612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482544794] [2023-08-27 07:35:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:22,972 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) [2023-08-27 07:35:22,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 07:35:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:23,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:35:23,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:23,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:23,147 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 07:35:23,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 07:35:23,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:35:23,260 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:35:23,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 07:35:23,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:35:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:23,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:35:23,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:23,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:35:23,459 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:35:23,461 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:23,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-27 07:35:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:23,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:25,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:25,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-08-27 07:35:25,761 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:25,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1233 treesize of output 1169 [2023-08-27 07:35:25,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2023-08-27 07:35:25,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2023-08-27 07:35:25,794 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-08-27 07:35:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:25,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482544794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:25,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:25,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-08-27 07:35:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749719298] [2023-08-27 07:35:25,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:25,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:35:25,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:35:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=420, Unknown=6, NotChecked=0, Total=506 [2023-08-27 07:35:25,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 486 [2023-08-27 07:35:25,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 705 flow. Second operand has 23 states, 23 states have (on average 144.56521739130434) internal successors, (3325), 23 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:25,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:25,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 486 [2023-08-27 07:35:25,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:30,507 INFO L124 PetriNetUnfolderBase]: 5870/8427 cut-off events. [2023-08-27 07:35:30,508 INFO L125 PetriNetUnfolderBase]: For 11373/11406 co-relation queries the response was YES. [2023-08-27 07:35:30,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32463 conditions, 8427 events. 5870/8427 cut-off events. For 11373/11406 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 46070 event pairs, 752 based on Foata normal form. 66/5500 useless extension candidates. Maximal degree in co-relation 32432. Up to 3956 conditions per place. [2023-08-27 07:35:30,558 INFO L140 encePairwiseOnDemand]: 467/486 looper letters, 293 selfloop transitions, 152 changer transitions 0/447 dead transitions. [2023-08-27 07:35:30,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 447 transitions, 3389 flow [2023-08-27 07:35:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 07:35:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 07:35:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5473 transitions. [2023-08-27 07:35:30,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31281435756744397 [2023-08-27 07:35:30,569 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5473 transitions. [2023-08-27 07:35:30,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5473 transitions. [2023-08-27 07:35:30,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:30,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5473 transitions. [2023-08-27 07:35:30,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 152.02777777777777) internal successors, (5473), 36 states have internal predecessors, (5473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:30,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 486.0) internal successors, (17982), 37 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:30,596 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 486.0) internal successors, (17982), 37 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:30,596 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 705 flow. Second operand 36 states and 5473 transitions. [2023-08-27 07:35:30,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 447 transitions, 3389 flow [2023-08-27 07:35:30,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 447 transitions, 3301 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-08-27 07:35:30,635 INFO L231 Difference]: Finished difference. Result has 139 places, 221 transitions, 2069 flow [2023-08-27 07:35:30,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2069, PETRI_PLACES=139, PETRI_TRANSITIONS=221} [2023-08-27 07:35:30,636 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 81 predicate places. [2023-08-27 07:35:30,636 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 221 transitions, 2069 flow [2023-08-27 07:35:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 144.56521739130434) internal successors, (3325), 23 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:30,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:30,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:30,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:30,843 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,SelfDestructingSolverStorable16 [2023-08-27 07:35:30,844 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:30,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 902844885, now seen corresponding path program 1 times [2023-08-27 07:35:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:30,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780537139] [2023-08-27 07:35:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:30,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:35:30,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780537139] [2023-08-27 07:35:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780537139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030757217] [2023-08-27 07:35:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:30,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:30,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:30,941 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) [2023-08-27 07:35:30,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 07:35:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:31,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:35:31,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:35:31,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:35:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030757217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:35:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-27 07:35:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115480474] [2023-08-27 07:35:31,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:31,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:35:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:35:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:35:31,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 486 [2023-08-27 07:35:31,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 221 transitions, 2069 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:31,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:31,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 486 [2023-08-27 07:35:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:31,885 INFO L124 PetriNetUnfolderBase]: 4506/6520 cut-off events. [2023-08-27 07:35:31,885 INFO L125 PetriNetUnfolderBase]: For 25150/25185 co-relation queries the response was YES. [2023-08-27 07:35:31,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30831 conditions, 6520 events. 4506/6520 cut-off events. For 25150/25185 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 34746 event pairs, 2009 based on Foata normal form. 273/4804 useless extension candidates. Maximal degree in co-relation 30786. Up to 6427 conditions per place. [2023-08-27 07:35:31,931 INFO L140 encePairwiseOnDemand]: 483/486 looper letters, 206 selfloop transitions, 1 changer transitions 0/211 dead transitions. [2023-08-27 07:35:31,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 211 transitions, 2366 flow [2023-08-27 07:35:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:35:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:35:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-27 07:35:31,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44650205761316875 [2023-08-27 07:35:31,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-27 07:35:31,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-27 07:35:31,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:31,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-27 07:35:31,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:31,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:31,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 486.0) internal successors, (1944), 4 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:31,935 INFO L175 Difference]: Start difference. First operand has 139 places, 221 transitions, 2069 flow. Second operand 3 states and 651 transitions. [2023-08-27 07:35:31,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 211 transitions, 2366 flow [2023-08-27 07:35:32,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 211 transitions, 2171 flow, removed 76 selfloop flow, removed 7 redundant places. [2023-08-27 07:35:32,028 INFO L231 Difference]: Finished difference. Result has 132 places, 211 transitions, 1759 flow [2023-08-27 07:35:32,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1759, PETRI_PLACES=132, PETRI_TRANSITIONS=211} [2023-08-27 07:35:32,029 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2023-08-27 07:35:32,029 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 211 transitions, 1759 flow [2023-08-27 07:35:32,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:32,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:32,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:32,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 07:35:32,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 07:35:32,235 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:32,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:32,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1045183472, now seen corresponding path program 1 times [2023-08-27 07:35:32,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:32,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418836663] [2023-08-27 07:35:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:32,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:32,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418836663] [2023-08-27 07:35:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418836663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:32,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680059836] [2023-08-27 07:35:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:32,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:32,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:32,629 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) [2023-08-27 07:35:32,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 07:35:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:32,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 07:35:32,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:32,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:32,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:32,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 07:35:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680059836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:33,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:33,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 07:35:33,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369972434] [2023-08-27 07:35:33,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:33,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 07:35:33,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 07:35:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:35:33,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 486 [2023-08-27 07:35:33,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 211 transitions, 1759 flow. Second operand has 17 states, 17 states have (on average 155.11764705882354) internal successors, (2637), 17 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:33,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:33,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 486 [2023-08-27 07:35:33,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:34,329 INFO L124 PetriNetUnfolderBase]: 4543/6614 cut-off events. [2023-08-27 07:35:34,329 INFO L125 PetriNetUnfolderBase]: For 20657/20693 co-relation queries the response was YES. [2023-08-27 07:35:34,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30442 conditions, 6614 events. 4543/6614 cut-off events. For 20657/20693 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 35877 event pairs, 1360 based on Foata normal form. 60/4784 useless extension candidates. Maximal degree in co-relation 30399. Up to 2976 conditions per place. [2023-08-27 07:35:34,368 INFO L140 encePairwiseOnDemand]: 473/486 looper letters, 303 selfloop transitions, 62 changer transitions 0/367 dead transitions. [2023-08-27 07:35:34,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 367 transitions, 3285 flow [2023-08-27 07:35:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 07:35:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 07:35:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2638 transitions. [2023-08-27 07:35:34,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392489711934156 [2023-08-27 07:35:34,371 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2638 transitions. [2023-08-27 07:35:34,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2638 transitions. [2023-08-27 07:35:34,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:34,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2638 transitions. [2023-08-27 07:35:34,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 164.875) internal successors, (2638), 16 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:34,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 486.0) internal successors, (8262), 17 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:34,379 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 486.0) internal successors, (8262), 17 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:34,379 INFO L175 Difference]: Start difference. First operand has 132 places, 211 transitions, 1759 flow. Second operand 16 states and 2638 transitions. [2023-08-27 07:35:34,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 367 transitions, 3285 flow [2023-08-27 07:35:34,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 367 transitions, 3270 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-27 07:35:34,447 INFO L231 Difference]: Finished difference. Result has 152 places, 231 transitions, 2210 flow [2023-08-27 07:35:34,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2210, PETRI_PLACES=152, PETRI_TRANSITIONS=231} [2023-08-27 07:35:34,448 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2023-08-27 07:35:34,448 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 231 transitions, 2210 flow [2023-08-27 07:35:34,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 155.11764705882354) internal successors, (2637), 17 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:34,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:34,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:34,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:34,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:34,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash 878949692, now seen corresponding path program 2 times [2023-08-27 07:35:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:34,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659531871] [2023-08-27 07:35:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:35,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:35,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659531871] [2023-08-27 07:35:35,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659531871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:35,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529895771] [2023-08-27 07:35:35,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:35:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:35,285 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) [2023-08-27 07:35:35,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 07:35:35,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:35:35,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:35,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:35:35,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:35,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:35:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:35:35,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:35:35,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529895771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:35:35,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:35:35,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 07:35:35,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761574625] [2023-08-27 07:35:35,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:35:35,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:35:35,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:35:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:35:35,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 486 [2023-08-27 07:35:35,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 231 transitions, 2210 flow. Second operand has 7 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:35,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:35,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 486 [2023-08-27 07:35:35,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:36,348 INFO L124 PetriNetUnfolderBase]: 4178/6090 cut-off events. [2023-08-27 07:35:36,348 INFO L125 PetriNetUnfolderBase]: For 25546/25582 co-relation queries the response was YES. [2023-08-27 07:35:36,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29298 conditions, 6090 events. 4178/6090 cut-off events. For 25546/25582 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 31459 event pairs, 1688 based on Foata normal form. 108/4634 useless extension candidates. Maximal degree in co-relation 29248. Up to 5403 conditions per place. [2023-08-27 07:35:36,383 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 221 selfloop transitions, 38 changer transitions 0/261 dead transitions. [2023-08-27 07:35:36,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 261 transitions, 2800 flow [2023-08-27 07:35:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:35:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:35:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1106 transitions. [2023-08-27 07:35:36,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792866941015089 [2023-08-27 07:35:36,384 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1106 transitions. [2023-08-27 07:35:36,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1106 transitions. [2023-08-27 07:35:36,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:36,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1106 transitions. [2023-08-27 07:35:36,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.33333333333334) internal successors, (1106), 6 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:36,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:36,387 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:36,387 INFO L175 Difference]: Start difference. First operand has 152 places, 231 transitions, 2210 flow. Second operand 6 states and 1106 transitions. [2023-08-27 07:35:36,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 261 transitions, 2800 flow [2023-08-27 07:35:36,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 2731 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-08-27 07:35:36,435 INFO L231 Difference]: Finished difference. Result has 148 places, 225 transitions, 2181 flow [2023-08-27 07:35:36,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2181, PETRI_PLACES=148, PETRI_TRANSITIONS=225} [2023-08-27 07:35:36,435 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 90 predicate places. [2023-08-27 07:35:36,436 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 225 transitions, 2181 flow [2023-08-27 07:35:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:36,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:36,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:36,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:36,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:36,641 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:35:36,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1394274410, now seen corresponding path program 1 times [2023-08-27 07:35:36,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:36,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649413423] [2023-08-27 07:35:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:36,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:37,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649413423] [2023-08-27 07:35:37,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649413423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513708219] [2023-08-27 07:35:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:37,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:37,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:37,061 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) [2023-08-27 07:35:37,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 07:35:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:37,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 07:35:37,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:37,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:37,242 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 07:35:37,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 07:35:37,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:35:37,379 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:35:37,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 07:35:37,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:35:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:37,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:35:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:35:37,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:35:37,637 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:35:37,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-27 07:35:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:37,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:41,986 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:41,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-08-27 07:35:41,996 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:35:41,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 163 [2023-08-27 07:35:42,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2023-08-27 07:35:42,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 116 [2023-08-27 07:35:42,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2023-08-27 07:35:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:42,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513708219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:42,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:42,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 07:35:42,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902083631] [2023-08-27 07:35:42,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:42,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 07:35:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 07:35:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=469, Unknown=7, NotChecked=0, Total=552 [2023-08-27 07:35:42,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 486 [2023-08-27 07:35:42,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 225 transitions, 2181 flow. Second operand has 24 states, 24 states have (on average 142.5) internal successors, (3420), 24 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:42,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:42,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 486 [2023-08-27 07:35:42,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:45,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 07:36:27,319 WARN L234 SmtUtils]: Spent 35.60s on a formula simplification. DAG size of input: 80 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:36:28,213 INFO L124 PetriNetUnfolderBase]: 4381/6437 cut-off events. [2023-08-27 07:36:28,214 INFO L125 PetriNetUnfolderBase]: For 29276/29312 co-relation queries the response was YES. [2023-08-27 07:36:28,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31510 conditions, 6437 events. 4381/6437 cut-off events. For 29276/29312 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 34736 event pairs, 1224 based on Foata normal form. 54/4889 useless extension candidates. Maximal degree in co-relation 31461. Up to 4070 conditions per place. [2023-08-27 07:36:28,255 INFO L140 encePairwiseOnDemand]: 462/486 looper letters, 328 selfloop transitions, 89 changer transitions 0/419 dead transitions. [2023-08-27 07:36:28,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 419 transitions, 3987 flow [2023-08-27 07:36:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 07:36:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 07:36:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4598 transitions. [2023-08-27 07:36:28,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30519049515465285 [2023-08-27 07:36:28,260 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4598 transitions. [2023-08-27 07:36:28,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4598 transitions. [2023-08-27 07:36:28,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:36:28,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4598 transitions. [2023-08-27 07:36:28,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 148.32258064516128) internal successors, (4598), 31 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:28,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 486.0) internal successors, (15552), 32 states have internal predecessors, (15552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:28,271 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 486.0) internal successors, (15552), 32 states have internal predecessors, (15552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:28,271 INFO L175 Difference]: Start difference. First operand has 148 places, 225 transitions, 2181 flow. Second operand 31 states and 4598 transitions. [2023-08-27 07:36:28,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 419 transitions, 3987 flow [2023-08-27 07:36:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 419 transitions, 3944 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 07:36:28,336 INFO L231 Difference]: Finished difference. Result has 181 places, 252 transitions, 2689 flow [2023-08-27 07:36:28,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2689, PETRI_PLACES=181, PETRI_TRANSITIONS=252} [2023-08-27 07:36:28,336 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 123 predicate places. [2023-08-27 07:36:28,336 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 252 transitions, 2689 flow [2023-08-27 07:36:28,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 142.5) internal successors, (3420), 24 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:28,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:36:28,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:36:28,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 07:36:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-27 07:36:28,543 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:36:28,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:36:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1537992681, now seen corresponding path program 2 times [2023-08-27 07:36:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:36:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859140141] [2023-08-27 07:36:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:36:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:36:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:36:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:36:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:36:29,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859140141] [2023-08-27 07:36:29,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859140141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:36:29,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433079469] [2023-08-27 07:36:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:36:29,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:36:29,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:36:29,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:36:29,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 07:36:29,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:36:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:36:29,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:36:29,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:36:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:36:29,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:36:29,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:36:29,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 07:36:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:36:29,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433079469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:36:29,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:36:29,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 3] total 17 [2023-08-27 07:36:29,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687486907] [2023-08-27 07:36:29,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:36:29,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:36:29,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:36:29,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:36:29,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:36:29,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 486 [2023-08-27 07:36:29,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 252 transitions, 2689 flow. Second operand has 19 states, 19 states have (on average 143.1578947368421) internal successors, (2720), 19 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:29,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:36:29,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 486 [2023-08-27 07:36:29,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:36:31,530 INFO L124 PetriNetUnfolderBase]: 5438/7886 cut-off events. [2023-08-27 07:36:31,530 INFO L125 PetriNetUnfolderBase]: For 53478/53517 co-relation queries the response was YES. [2023-08-27 07:36:31,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44910 conditions, 7886 events. 5438/7886 cut-off events. For 53478/53517 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 42680 event pairs, 989 based on Foata normal form. 163/6708 useless extension candidates. Maximal degree in co-relation 44855. Up to 4166 conditions per place. [2023-08-27 07:36:31,672 INFO L140 encePairwiseOnDemand]: 472/486 looper letters, 293 selfloop transitions, 120 changer transitions 0/415 dead transitions. [2023-08-27 07:36:31,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 415 transitions, 4844 flow [2023-08-27 07:36:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 07:36:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 07:36:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2694 transitions. [2023-08-27 07:36:31,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30795610425240055 [2023-08-27 07:36:31,677 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2694 transitions. [2023-08-27 07:36:31,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2694 transitions. [2023-08-27 07:36:31,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:36:31,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2694 transitions. [2023-08-27 07:36:31,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.66666666666666) internal successors, (2694), 18 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:31,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 486.0) internal successors, (9234), 19 states have internal predecessors, (9234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:31,687 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 486.0) internal successors, (9234), 19 states have internal predecessors, (9234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:31,687 INFO L175 Difference]: Start difference. First operand has 181 places, 252 transitions, 2689 flow. Second operand 18 states and 2694 transitions. [2023-08-27 07:36:31,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 415 transitions, 4844 flow [2023-08-27 07:36:31,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 415 transitions, 4727 flow, removed 28 selfloop flow, removed 16 redundant places. [2023-08-27 07:36:31,849 INFO L231 Difference]: Finished difference. Result has 190 places, 287 transitions, 3533 flow [2023-08-27 07:36:31,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3533, PETRI_PLACES=190, PETRI_TRANSITIONS=287} [2023-08-27 07:36:31,849 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 132 predicate places. [2023-08-27 07:36:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 287 transitions, 3533 flow [2023-08-27 07:36:31,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.1578947368421) internal successors, (2720), 19 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:31,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:36:31,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:36:31,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-27 07:36:32,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-27 07:36:32,050 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:36:32,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:36:32,051 INFO L85 PathProgramCache]: Analyzing trace with hash 796797189, now seen corresponding path program 1 times [2023-08-27 07:36:32,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:36:32,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309637640] [2023-08-27 07:36:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:36:32,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:36:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:36:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:36:32,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:36:32,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309637640] [2023-08-27 07:36:32,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309637640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:36:32,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087167340] [2023-08-27 07:36:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:36:32,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:36:32,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:36:32,441 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:36:32,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 07:36:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:36:32,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 07:36:32,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:36:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:36:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:36:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:36:32,631 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 07:36:32,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 07:36:32,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:36:32,747 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:36:32,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 07:36:32,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:36:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:36:32,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:36:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:36:32,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:36:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:36:33,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 07:36:33,056 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:36:33,058 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:36:33,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-27 07:36:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:36:33,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:36:33,415 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:36:33,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-08-27 07:36:33,444 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:36:33,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43265 treesize of output 42241 [2023-08-27 07:36:33,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 151 [2023-08-27 07:36:33,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 139 [2023-08-27 07:36:33,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 115 [2023-08-27 07:36:33,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2023-08-27 07:36:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:36:33,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087167340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:36:33,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:36:33,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-27 07:36:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986398751] [2023-08-27 07:36:33,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:36:33,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 07:36:33,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:36:33,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 07:36:33,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=551, Unknown=12, NotChecked=0, Total=650 [2023-08-27 07:36:33,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 486 [2023-08-27 07:36:33,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 287 transitions, 3533 flow. Second operand has 26 states, 26 states have (on average 141.5) internal successors, (3679), 26 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:33,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:36:33,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 486 [2023-08-27 07:36:33,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:36:34,471 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) (forall ((v_ArrVal_865 (Array Int Int)) (v_ArrVal_866 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_865) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_866) c_~q1~0.base) .cse0)) 2147483648))) (forall ((v_ArrVal_866 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_866) c_~q1~0.base) .cse0)) 2147483648)))) is different from false [2023-08-27 07:36:39,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:36:42,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:08,917 WARN L234 SmtUtils]: Spent 25.20s on a formula simplification. DAG size of input: 94 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:37:13,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:15,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:17,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:20,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:22,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:25,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:26,546 INFO L124 PetriNetUnfolderBase]: 6108/9009 cut-off events. [2023-08-27 07:37:26,546 INFO L125 PetriNetUnfolderBase]: For 86933/86972 co-relation queries the response was YES. [2023-08-27 07:37:26,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56320 conditions, 9009 events. 6108/9009 cut-off events. For 86933/86972 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 52422 event pairs, 1442 based on Foata normal form. 65/7605 useless extension candidates. Maximal degree in co-relation 56256. Up to 5223 conditions per place. [2023-08-27 07:37:26,604 INFO L140 encePairwiseOnDemand]: 460/486 looper letters, 432 selfloop transitions, 146 changer transitions 0/580 dead transitions. [2023-08-27 07:37:26,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 580 transitions, 6819 flow [2023-08-27 07:37:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 07:37:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 07:37:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5054 transitions. [2023-08-27 07:37:26,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30585814572742676 [2023-08-27 07:37:26,611 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5054 transitions. [2023-08-27 07:37:26,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5054 transitions. [2023-08-27 07:37:26,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:37:26,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5054 transitions. [2023-08-27 07:37:26,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 148.64705882352942) internal successors, (5054), 34 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:26,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 486.0) internal successors, (17010), 35 states have internal predecessors, (17010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:26,628 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 486.0) internal successors, (17010), 35 states have internal predecessors, (17010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:26,628 INFO L175 Difference]: Start difference. First operand has 190 places, 287 transitions, 3533 flow. Second operand 34 states and 5054 transitions. [2023-08-27 07:37:26,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 580 transitions, 6819 flow [2023-08-27 07:37:26,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 580 transitions, 6502 flow, removed 151 selfloop flow, removed 4 redundant places. [2023-08-27 07:37:26,950 INFO L231 Difference]: Finished difference. Result has 229 places, 353 transitions, 4647 flow [2023-08-27 07:37:26,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4647, PETRI_PLACES=229, PETRI_TRANSITIONS=353} [2023-08-27 07:37:26,950 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 171 predicate places. [2023-08-27 07:37:26,950 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 353 transitions, 4647 flow [2023-08-27 07:37:26,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 141.5) internal successors, (3679), 26 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:26,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:37:26,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:37:26,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 07:37:27,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:27,151 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:37:27,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:37:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash 272933613, now seen corresponding path program 1 times [2023-08-27 07:37:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:37:27,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76129440] [2023-08-27 07:37:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:37:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:37:27,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:37:27,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76129440] [2023-08-27 07:37:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76129440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:37:27,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52889683] [2023-08-27 07:37:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:27,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:27,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:37:27,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:37:27,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 07:37:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:27,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 07:37:27,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:37:27,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-27 07:37:28,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 07:37:28,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 07:37:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:37:28,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:37:28,374 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_925 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_925) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-27 07:37:28,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:37:28,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 158 [2023-08-27 07:37:28,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-27 07:37:28,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-27 07:37:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:37:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52889683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:37:28,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:37:28,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-27 07:37:28,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572854169] [2023-08-27 07:37:28,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:37:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:37:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:37:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:37:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=378, Unknown=6, NotChecked=40, Total=506 [2023-08-27 07:37:28,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 486 [2023-08-27 07:37:28,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 353 transitions, 4647 flow. Second operand has 23 states, 23 states have (on average 149.69565217391303) internal successors, (3443), 23 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:28,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:37:28,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 486 [2023-08-27 07:37:28,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:37:34,579 INFO L124 PetriNetUnfolderBase]: 6432/9448 cut-off events. [2023-08-27 07:37:34,580 INFO L125 PetriNetUnfolderBase]: For 108326/108398 co-relation queries the response was YES. [2023-08-27 07:37:34,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67495 conditions, 9448 events. 6432/9448 cut-off events. For 108326/108398 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 54327 event pairs, 715 based on Foata normal form. 126/8340 useless extension candidates. Maximal degree in co-relation 67420. Up to 3685 conditions per place. [2023-08-27 07:37:34,664 INFO L140 encePairwiseOnDemand]: 472/486 looper letters, 375 selfloop transitions, 165 changer transitions 0/542 dead transitions. [2023-08-27 07:37:34,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 542 transitions, 7491 flow [2023-08-27 07:37:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 07:37:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 07:37:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3313 transitions. [2023-08-27 07:37:34,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3246129727611209 [2023-08-27 07:37:34,668 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3313 transitions. [2023-08-27 07:37:34,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3313 transitions. [2023-08-27 07:37:34,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:37:34,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3313 transitions. [2023-08-27 07:37:34,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 157.76190476190476) internal successors, (3313), 21 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:34,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 486.0) internal successors, (10692), 22 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:34,678 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 486.0) internal successors, (10692), 22 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:34,678 INFO L175 Difference]: Start difference. First operand has 229 places, 353 transitions, 4647 flow. Second operand 21 states and 3313 transitions. [2023-08-27 07:37:34,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 542 transitions, 7491 flow [2023-08-27 07:37:35,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 542 transitions, 7347 flow, removed 42 selfloop flow, removed 12 redundant places. [2023-08-27 07:37:35,180 INFO L231 Difference]: Finished difference. Result has 241 places, 378 transitions, 5393 flow [2023-08-27 07:37:35,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5393, PETRI_PLACES=241, PETRI_TRANSITIONS=378} [2023-08-27 07:37:35,181 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 183 predicate places. [2023-08-27 07:37:35,181 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 378 transitions, 5393 flow [2023-08-27 07:37:35,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 149.69565217391303) internal successors, (3443), 23 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:35,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:37:35,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:37:35,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-27 07:37:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:35,383 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:37:35,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:37:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1418169601, now seen corresponding path program 1 times [2023-08-27 07:37:35,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:37:35,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848275382] [2023-08-27 07:37:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:35,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:37:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:37:36,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:37:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848275382] [2023-08-27 07:37:36,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848275382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:37:36,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538644568] [2023-08-27 07:37:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:36,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:37:36,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:37:36,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 07:37:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:36,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 07:37:36,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:37:36,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:36,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:37:36,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:37:36,537 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_978 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_978) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-08-27 07:37:36,549 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:37:36,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-27 07:37:36,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-27 07:37:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:37:36,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538644568] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:37:36,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:37:36,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-27 07:37:36,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091583314] [2023-08-27 07:37:36,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:37:36,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:37:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:37:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:37:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2023-08-27 07:37:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 486 [2023-08-27 07:37:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 378 transitions, 5393 flow. Second operand has 7 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:37:36,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 486 [2023-08-27 07:37:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:37:38,430 INFO L124 PetriNetUnfolderBase]: 6947/10098 cut-off events. [2023-08-27 07:37:38,430 INFO L125 PetriNetUnfolderBase]: For 141322/141388 co-relation queries the response was YES. [2023-08-27 07:37:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78526 conditions, 10098 events. 6947/10098 cut-off events. For 141322/141388 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 56876 event pairs, 913 based on Foata normal form. 150/8968 useless extension candidates. Maximal degree in co-relation 78446. Up to 6485 conditions per place. [2023-08-27 07:37:38,521 INFO L140 encePairwiseOnDemand]: 469/486 looper letters, 303 selfloop transitions, 175 changer transitions 0/480 dead transitions. [2023-08-27 07:37:38,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 480 transitions, 7823 flow [2023-08-27 07:37:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:37:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:37:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1297 transitions. [2023-08-27 07:37:38,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38124632569077016 [2023-08-27 07:37:38,523 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1297 transitions. [2023-08-27 07:37:38,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1297 transitions. [2023-08-27 07:37:38,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:37:38,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1297 transitions. [2023-08-27 07:37:38,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:38,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 486.0) internal successors, (3888), 8 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:38,526 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 486.0) internal successors, (3888), 8 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:38,526 INFO L175 Difference]: Start difference. First operand has 241 places, 378 transitions, 5393 flow. Second operand 7 states and 1297 transitions. [2023-08-27 07:37:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 480 transitions, 7823 flow [2023-08-27 07:37:39,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 480 transitions, 7624 flow, removed 43 selfloop flow, removed 11 redundant places. [2023-08-27 07:37:39,024 INFO L231 Difference]: Finished difference. Result has 240 places, 435 transitions, 6962 flow [2023-08-27 07:37:39,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=5218, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6962, PETRI_PLACES=240, PETRI_TRANSITIONS=435} [2023-08-27 07:37:39,025 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 182 predicate places. [2023-08-27 07:37:39,025 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 435 transitions, 6962 flow [2023-08-27 07:37:39,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:39,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:37:39,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:37:39,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 07:37:39,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 07:37:39,226 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:37:39,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:37:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1477736727, now seen corresponding path program 2 times [2023-08-27 07:37:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:37:39,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35243596] [2023-08-27 07:37:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:37:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:37:40,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:37:40,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35243596] [2023-08-27 07:37:40,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35243596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:37:40,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435805047] [2023-08-27 07:37:40,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:37:40,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:40,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:37:40,105 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:37:40,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 07:37:40,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:37:40,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:37:40,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:37:40,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:37:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:40,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:40,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:37:40,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:37:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435805047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:37:40,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:37:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2023-08-27 07:37:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076701296] [2023-08-27 07:37:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:37:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:37:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:37:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:37:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:37:40,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 486 [2023-08-27 07:37:40,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 435 transitions, 6962 flow. Second operand has 8 states, 8 states have (on average 170.625) internal successors, (1365), 8 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:40,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:37:40,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 486 [2023-08-27 07:37:40,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:37:42,204 INFO L124 PetriNetUnfolderBase]: 6598/9644 cut-off events. [2023-08-27 07:37:42,204 INFO L125 PetriNetUnfolderBase]: For 179627/179693 co-relation queries the response was YES. [2023-08-27 07:37:42,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80170 conditions, 9644 events. 6598/9644 cut-off events. For 179627/179693 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 54242 event pairs, 1816 based on Foata normal form. 111/8599 useless extension candidates. Maximal degree in co-relation 80085. Up to 7954 conditions per place. [2023-08-27 07:37:42,293 INFO L140 encePairwiseOnDemand]: 478/486 looper letters, 432 selfloop transitions, 40 changer transitions 0/474 dead transitions. [2023-08-27 07:37:42,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 474 transitions, 8364 flow [2023-08-27 07:37:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:37:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:37:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1088 transitions. [2023-08-27 07:37:42,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3731138545953361 [2023-08-27 07:37:42,295 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1088 transitions. [2023-08-27 07:37:42,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1088 transitions. [2023-08-27 07:37:42,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:37:42,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1088 transitions. [2023-08-27 07:37:42,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:42,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:42,307 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:42,307 INFO L175 Difference]: Start difference. First operand has 240 places, 435 transitions, 6962 flow. Second operand 6 states and 1088 transitions. [2023-08-27 07:37:42,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 474 transitions, 8364 flow [2023-08-27 07:37:42,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 474 transitions, 8187 flow, removed 39 selfloop flow, removed 4 redundant places. [2023-08-27 07:37:42,931 INFO L231 Difference]: Finished difference. Result has 243 places, 437 transitions, 6960 flow [2023-08-27 07:37:42,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=6775, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6960, PETRI_PLACES=243, PETRI_TRANSITIONS=437} [2023-08-27 07:37:42,932 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 185 predicate places. [2023-08-27 07:37:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 437 transitions, 6960 flow [2023-08-27 07:37:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 170.625) internal successors, (1365), 8 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:37:42,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:37:42,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 07:37:43,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 07:37:43,133 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:37:43,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:37:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash 272933801, now seen corresponding path program 1 times [2023-08-27 07:37:43,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:37:43,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611944327] [2023-08-27 07:37:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:43,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:37:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:37:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:37:43,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611944327] [2023-08-27 07:37:43,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611944327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:37:43,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976346869] [2023-08-27 07:37:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:43,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:43,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:37:43,659 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:37:43,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 07:37:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:43,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:37:43,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:37:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:43,827 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 07:37:43,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 07:37:43,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:37:43,984 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:37:43,984 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 07:37:44,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:44,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:44,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:37:44,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:37:44,441 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:37:44,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-27 07:37:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:37:44,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:37:44,555 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1094 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1094) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 07:37:44,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:37:44,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-08-27 07:37:44,982 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:37:44,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5409 treesize of output 5281 [2023-08-27 07:37:45,002 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 145 [2023-08-27 07:37:45,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 139 [2023-08-27 07:37:45,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 254 [2023-08-27 07:37:45,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 114 [2023-08-27 07:37:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:37:45,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976346869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:37:45,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:37:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 07:37:45,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673157165] [2023-08-27 07:37:45,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:37:45,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 07:37:45,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:37:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 07:37:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=556, Unknown=10, NotChecked=48, Total=702 [2023-08-27 07:37:45,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 486 [2023-08-27 07:37:45,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 437 transitions, 6960 flow. Second operand has 27 states, 27 states have (on average 141.44444444444446) internal successors, (3819), 27 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:45,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:37:45,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 486 [2023-08-27 07:37:45,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:37:47,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:50,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:53,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:37:56,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:38:12,176 INFO L124 PetriNetUnfolderBase]: 6734/9861 cut-off events. [2023-08-27 07:38:12,176 INFO L125 PetriNetUnfolderBase]: For 178975/179041 co-relation queries the response was YES. [2023-08-27 07:38:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81752 conditions, 9861 events. 6734/9861 cut-off events. For 178975/179041 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 56036 event pairs, 1602 based on Foata normal form. 69/8785 useless extension candidates. Maximal degree in co-relation 81666. Up to 6455 conditions per place. [2023-08-27 07:38:12,268 INFO L140 encePairwiseOnDemand]: 472/486 looper letters, 432 selfloop transitions, 123 changer transitions 0/557 dead transitions. [2023-08-27 07:38:12,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 557 transitions, 9274 flow [2023-08-27 07:38:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 07:38:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 07:38:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3812 transitions. [2023-08-27 07:38:12,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30167774612219056 [2023-08-27 07:38:12,272 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3812 transitions. [2023-08-27 07:38:12,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3812 transitions. [2023-08-27 07:38:12,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:12,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3812 transitions. [2023-08-27 07:38:12,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 146.6153846153846) internal successors, (3812), 26 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:12,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 486.0) internal successors, (13122), 27 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:12,281 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 486.0) internal successors, (13122), 27 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:12,281 INFO L175 Difference]: Start difference. First operand has 243 places, 437 transitions, 6960 flow. Second operand 26 states and 3812 transitions. [2023-08-27 07:38:12,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 557 transitions, 9274 flow [2023-08-27 07:38:12,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 557 transitions, 9182 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-27 07:38:12,977 INFO L231 Difference]: Finished difference. Result has 265 places, 444 transitions, 7424 flow [2023-08-27 07:38:12,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=6846, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7424, PETRI_PLACES=265, PETRI_TRANSITIONS=444} [2023-08-27 07:38:12,977 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 207 predicate places. [2023-08-27 07:38:12,977 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 444 transitions, 7424 flow [2023-08-27 07:38:12,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 141.44444444444446) internal successors, (3819), 27 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:12,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:12,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:12,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:13,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 07:38:13,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:38:13,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -901041173, now seen corresponding path program 2 times [2023-08-27 07:38:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344250675] [2023-08-27 07:38:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:38:14,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344250675] [2023-08-27 07:38:14,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344250675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765743266] [2023-08-27 07:38:14,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:38:14,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:14,630 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:14,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 07:38:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:38:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:38:14,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:38:14,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:38:14,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:38:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 07:38:15,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:38:15,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765743266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:38:15,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:38:15,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-08-27 07:38:15,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020406970] [2023-08-27 07:38:15,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:38:15,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:38:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:15,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:38:15,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:38:15,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 486 [2023-08-27 07:38:15,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 444 transitions, 7424 flow. Second operand has 7 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:15,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:15,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 486 [2023-08-27 07:38:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:17,002 INFO L124 PetriNetUnfolderBase]: 6781/9989 cut-off events. [2023-08-27 07:38:17,002 INFO L125 PetriNetUnfolderBase]: For 200878/200944 co-relation queries the response was YES. [2023-08-27 07:38:17,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83766 conditions, 9989 events. 6781/9989 cut-off events. For 200878/200944 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 57288 event pairs, 1499 based on Foata normal form. 208/9031 useless extension candidates. Maximal degree in co-relation 83679. Up to 6755 conditions per place. [2023-08-27 07:38:17,098 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 363 selfloop transitions, 127 changer transitions 0/492 dead transitions. [2023-08-27 07:38:17,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 492 transitions, 8918 flow [2023-08-27 07:38:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:38:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:38:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1110 transitions. [2023-08-27 07:38:17,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38065843621399176 [2023-08-27 07:38:17,099 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1110 transitions. [2023-08-27 07:38:17,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1110 transitions. [2023-08-27 07:38:17,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:17,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1110 transitions. [2023-08-27 07:38:17,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:17,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:17,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:17,102 INFO L175 Difference]: Start difference. First operand has 265 places, 444 transitions, 7424 flow. Second operand 6 states and 1110 transitions. [2023-08-27 07:38:17,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 492 transitions, 8918 flow [2023-08-27 07:38:17,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 492 transitions, 8689 flow, removed 19 selfloop flow, removed 23 redundant places. [2023-08-27 07:38:17,850 INFO L231 Difference]: Finished difference. Result has 249 places, 441 transitions, 7525 flow [2023-08-27 07:38:17,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=7042, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7525, PETRI_PLACES=249, PETRI_TRANSITIONS=441} [2023-08-27 07:38:17,850 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 191 predicate places. [2023-08-27 07:38:17,850 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 441 transitions, 7525 flow [2023-08-27 07:38:17,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:17,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:17,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:17,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:18,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:18,056 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:38:18,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1538089958, now seen corresponding path program 1 times [2023-08-27 07:38:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21069580] [2023-08-27 07:38:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:18,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:38:18,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21069580] [2023-08-27 07:38:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21069580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93473995] [2023-08-27 07:38:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:18,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:18,810 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:18,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 07:38:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:18,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:38:18,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:38:19,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:38:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:38:19,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:38:19,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93473995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:38:19,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:38:19,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 07:38:19,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335944540] [2023-08-27 07:38:19,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:38:19,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:38:19,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:38:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:38:19,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 486 [2023-08-27 07:38:19,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 441 transitions, 7525 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:19,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:19,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 486 [2023-08-27 07:38:19,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:21,173 INFO L124 PetriNetUnfolderBase]: 7442/10911 cut-off events. [2023-08-27 07:38:21,173 INFO L125 PetriNetUnfolderBase]: For 206730/206796 co-relation queries the response was YES. [2023-08-27 07:38:21,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92381 conditions, 10911 events. 7442/10911 cut-off events. For 206730/206796 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 63266 event pairs, 1161 based on Foata normal form. 117/9645 useless extension candidates. Maximal degree in co-relation 92298. Up to 4992 conditions per place. [2023-08-27 07:38:21,274 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 397 selfloop transitions, 99 changer transitions 0/498 dead transitions. [2023-08-27 07:38:21,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 498 transitions, 9341 flow [2023-08-27 07:38:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:38:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:38:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1115 transitions. [2023-08-27 07:38:21,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3823731138545953 [2023-08-27 07:38:21,276 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1115 transitions. [2023-08-27 07:38:21,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1115 transitions. [2023-08-27 07:38:21,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:21,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1115 transitions. [2023-08-27 07:38:21,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.83333333333334) internal successors, (1115), 6 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:21,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:21,278 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:21,278 INFO L175 Difference]: Start difference. First operand has 249 places, 441 transitions, 7525 flow. Second operand 6 states and 1115 transitions. [2023-08-27 07:38:21,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 498 transitions, 9341 flow [2023-08-27 07:38:22,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 498 transitions, 9179 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-27 07:38:22,041 INFO L231 Difference]: Finished difference. Result has 254 places, 450 transitions, 7966 flow [2023-08-27 07:38:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=7363, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7966, PETRI_PLACES=254, PETRI_TRANSITIONS=450} [2023-08-27 07:38:22,042 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 196 predicate places. [2023-08-27 07:38:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 450 transitions, 7966 flow [2023-08-27 07:38:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:22,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:22,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:22,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 07:38:22,244 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:38:22,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1752494411, now seen corresponding path program 1 times [2023-08-27 07:38:22,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:22,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018437402] [2023-08-27 07:38:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:22,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:38:22,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:22,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018437402] [2023-08-27 07:38:22,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018437402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:22,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035919369] [2023-08-27 07:38:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:22,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:22,369 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:22,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 07:38:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:22,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 07:38:22,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:38:22,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:38:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:38:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035919369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:38:22,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:38:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-27 07:38:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513923608] [2023-08-27 07:38:22,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:38:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 07:38:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 07:38:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-27 07:38:22,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 486 [2023-08-27 07:38:22,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 450 transitions, 7966 flow. Second operand has 12 states, 12 states have (on average 174.66666666666666) internal successors, (2096), 12 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:22,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:22,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 486 [2023-08-27 07:38:22,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:27,237 INFO L124 PetriNetUnfolderBase]: 14892/21735 cut-off events. [2023-08-27 07:38:27,237 INFO L125 PetriNetUnfolderBase]: For 502065/502208 co-relation queries the response was YES. [2023-08-27 07:38:27,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184532 conditions, 21735 events. 14892/21735 cut-off events. For 502065/502208 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 139143 event pairs, 2250 based on Foata normal form. 1106/19693 useless extension candidates. Maximal degree in co-relation 184446. Up to 8888 conditions per place. [2023-08-27 07:38:27,495 INFO L140 encePairwiseOnDemand]: 472/486 looper letters, 639 selfloop transitions, 288 changer transitions 0/933 dead transitions. [2023-08-27 07:38:27,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 933 transitions, 18126 flow [2023-08-27 07:38:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 07:38:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 07:38:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2799 transitions. [2023-08-27 07:38:27,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38395061728395063 [2023-08-27 07:38:27,497 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2799 transitions. [2023-08-27 07:38:27,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2799 transitions. [2023-08-27 07:38:27,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:27,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2799 transitions. [2023-08-27 07:38:27,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 186.6) internal successors, (2799), 15 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:27,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 486.0) internal successors, (7776), 16 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:27,504 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 486.0) internal successors, (7776), 16 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:27,504 INFO L175 Difference]: Start difference. First operand has 254 places, 450 transitions, 7966 flow. Second operand 15 states and 2799 transitions. [2023-08-27 07:38:27,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 933 transitions, 18126 flow [2023-08-27 07:38:29,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 933 transitions, 17736 flow, removed 61 selfloop flow, removed 7 redundant places. [2023-08-27 07:38:29,799 INFO L231 Difference]: Finished difference. Result has 265 places, 602 transitions, 12773 flow [2023-08-27 07:38:29,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=7256, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12773, PETRI_PLACES=265, PETRI_TRANSITIONS=602} [2023-08-27 07:38:29,800 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 207 predicate places. [2023-08-27 07:38:29,800 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 602 transitions, 12773 flow [2023-08-27 07:38:29,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 174.66666666666666) internal successors, (2096), 12 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:29,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:29,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:29,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:30,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:30,001 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:38:30,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1020638362, now seen corresponding path program 2 times [2023-08-27 07:38:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:30,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18317741] [2023-08-27 07:38:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:30,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:31,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18317741] [2023-08-27 07:38:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18317741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017521262] [2023-08-27 07:38:31,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:38:31,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:31,621 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 07:38:31,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:38:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:38:31,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 07:38:31,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:32,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:38:32,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:38:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:38:32,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:38:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:38:32,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:38:32,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017521262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:38:32,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:38:32,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 07:38:32,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131817536] [2023-08-27 07:38:32,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:38:32,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:38:32,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:38:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:38:32,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 486 [2023-08-27 07:38:32,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 602 transitions, 12773 flow. Second operand has 8 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:32,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:32,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 486 [2023-08-27 07:38:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:37,298 INFO L124 PetriNetUnfolderBase]: 14989/21885 cut-off events. [2023-08-27 07:38:37,298 INFO L125 PetriNetUnfolderBase]: For 610052/610172 co-relation queries the response was YES. [2023-08-27 07:38:37,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204369 conditions, 21885 events. 14989/21885 cut-off events. For 610052/610172 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 138734 event pairs, 2675 based on Foata normal form. 259/19035 useless extension candidates. Maximal degree in co-relation 204276. Up to 14054 conditions per place. [2023-08-27 07:38:37,638 INFO L140 encePairwiseOnDemand]: 478/486 looper letters, 506 selfloop transitions, 150 changer transitions 0/658 dead transitions. [2023-08-27 07:38:37,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 658 transitions, 15072 flow [2023-08-27 07:38:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:38:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:38:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1097 transitions. [2023-08-27 07:38:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3762002743484225 [2023-08-27 07:38:37,640 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1097 transitions. [2023-08-27 07:38:37,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1097 transitions. [2023-08-27 07:38:37,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:37,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1097 transitions. [2023-08-27 07:38:37,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:37,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:37,643 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:37,643 INFO L175 Difference]: Start difference. First operand has 265 places, 602 transitions, 12773 flow. Second operand 6 states and 1097 transitions. [2023-08-27 07:38:37,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 658 transitions, 15072 flow [2023-08-27 07:38:40,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 658 transitions, 14569 flow, removed 176 selfloop flow, removed 6 redundant places. [2023-08-27 07:38:40,941 INFO L231 Difference]: Finished difference. Result has 266 places, 611 transitions, 13145 flow [2023-08-27 07:38:40,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=12286, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13145, PETRI_PLACES=266, PETRI_TRANSITIONS=611} [2023-08-27 07:38:40,942 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 208 predicate places. [2023-08-27 07:38:40,942 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 611 transitions, 13145 flow [2023-08-27 07:38:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:40,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:40,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:40,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:41,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:41,143 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:38:41,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash -875096895, now seen corresponding path program 3 times [2023-08-27 07:38:41,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:41,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653270362] [2023-08-27 07:38:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:41,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:38:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653270362] [2023-08-27 07:38:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653270362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483203242] [2023-08-27 07:38:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:38:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:42,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:42,304 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:42,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 07:38:42,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 07:38:42,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:38:42,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 07:38:42,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:38:42,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:38:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:38:42,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:38:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483203242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:38:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:38:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 07:38:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207005423] [2023-08-27 07:38:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:38:42,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:38:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:38:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:38:42,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 486 [2023-08-27 07:38:42,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 611 transitions, 13145 flow. Second operand has 7 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:42,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:42,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 486 [2023-08-27 07:38:42,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:47,646 INFO L124 PetriNetUnfolderBase]: 14993/21998 cut-off events. [2023-08-27 07:38:47,646 INFO L125 PetriNetUnfolderBase]: For 554415/554502 co-relation queries the response was YES. [2023-08-27 07:38:47,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199698 conditions, 21998 events. 14993/21998 cut-off events. For 554415/554502 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 141996 event pairs, 3541 based on Foata normal form. 87/18872 useless extension candidates. Maximal degree in co-relation 199603. Up to 16771 conditions per place. [2023-08-27 07:38:47,885 INFO L140 encePairwiseOnDemand]: 478/486 looper letters, 568 selfloop transitions, 120 changer transitions 0/690 dead transitions. [2023-08-27 07:38:47,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 690 transitions, 15571 flow [2023-08-27 07:38:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:38:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:38:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1109 transitions. [2023-08-27 07:38:47,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38031550068587106 [2023-08-27 07:38:47,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1109 transitions. [2023-08-27 07:38:47,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1109 transitions. [2023-08-27 07:38:47,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:47,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1109 transitions. [2023-08-27 07:38:47,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.83333333333334) internal successors, (1109), 6 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:47,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:47,889 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:47,889 INFO L175 Difference]: Start difference. First operand has 266 places, 611 transitions, 13145 flow. Second operand 6 states and 1109 transitions. [2023-08-27 07:38:47,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 690 transitions, 15571 flow [2023-08-27 07:38:51,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 690 transitions, 15374 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-08-27 07:38:51,301 INFO L231 Difference]: Finished difference. Result has 267 places, 619 transitions, 13528 flow [2023-08-27 07:38:51,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=12956, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13528, PETRI_PLACES=267, PETRI_TRANSITIONS=619} [2023-08-27 07:38:51,302 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 209 predicate places. [2023-08-27 07:38:51,302 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 619 transitions, 13528 flow [2023-08-27 07:38:51,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:51,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:51,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:51,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:51,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:51,508 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:38:51,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash 120085330, now seen corresponding path program 1 times [2023-08-27 07:38:51,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:51,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831748401] [2023-08-27 07:38:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:51,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:38:52,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:52,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831748401] [2023-08-27 07:38:52,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831748401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:52,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516987833] [2023-08-27 07:38:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:52,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:52,009 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:52,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 07:38:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:52,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:38:52,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:38:52,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:38:52,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516987833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:38:52,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:38:52,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-08-27 07:38:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117680889] [2023-08-27 07:38:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:38:52,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:38:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:38:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-27 07:38:52,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 486 [2023-08-27 07:38:52,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 619 transitions, 13528 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:52,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:52,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 486 [2023-08-27 07:38:52,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:56,780 INFO L124 PetriNetUnfolderBase]: 13979/20697 cut-off events. [2023-08-27 07:38:56,781 INFO L125 PetriNetUnfolderBase]: For 560574/560687 co-relation queries the response was YES. [2023-08-27 07:38:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191449 conditions, 20697 events. 13979/20697 cut-off events. For 560574/560687 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 134513 event pairs, 2863 based on Foata normal form. 368/18262 useless extension candidates. Maximal degree in co-relation 191355. Up to 12616 conditions per place. [2023-08-27 07:38:57,021 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 457 selfloop transitions, 192 changer transitions 0/655 dead transitions. [2023-08-27 07:38:57,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 655 transitions, 15319 flow [2023-08-27 07:38:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:38:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:38:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 767 transitions. [2023-08-27 07:38:57,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39454732510288065 [2023-08-27 07:38:57,023 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 767 transitions. [2023-08-27 07:38:57,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 767 transitions. [2023-08-27 07:38:57,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:57,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 767 transitions. [2023-08-27 07:38:57,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:57,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:57,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:57,024 INFO L175 Difference]: Start difference. First operand has 267 places, 619 transitions, 13528 flow. Second operand 4 states and 767 transitions. [2023-08-27 07:38:57,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 655 transitions, 15319 flow [2023-08-27 07:39:00,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 655 transitions, 15210 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-27 07:39:00,283 INFO L231 Difference]: Finished difference. Result has 268 places, 612 transitions, 13863 flow [2023-08-27 07:39:00,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=13336, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=13863, PETRI_PLACES=268, PETRI_TRANSITIONS=612} [2023-08-27 07:39:00,283 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 210 predicate places. [2023-08-27 07:39:00,283 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 612 transitions, 13863 flow [2023-08-27 07:39:00,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:00,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:39:00,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:39:00,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 07:39:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:39:00,485 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:39:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:39:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -824765679, now seen corresponding path program 1 times [2023-08-27 07:39:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:39:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490051727] [2023-08-27 07:39:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:39:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:39:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:39:01,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:39:01,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490051727] [2023-08-27 07:39:01,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490051727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:39:01,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59689975] [2023-08-27 07:39:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:39:01,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:39:01,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:39:01,338 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:39:01,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 07:39:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:01,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 07:39:01,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:39:01,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:39:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:39:01,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 07:39:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:39:01,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 07:39:02,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:39:02,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 07:39:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:39:02,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:39:02,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:39:02,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-08-27 07:39:02,877 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:39:02,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 173 [2023-08-27 07:39:02,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 136 [2023-08-27 07:39:02,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 124 [2023-08-27 07:39:02,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-08-27 07:39:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:39:03,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59689975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:39:03,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:39:03,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-27 07:39:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743266888] [2023-08-27 07:39:03,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:39:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:39:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:39:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:39:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=427, Unknown=3, NotChecked=0, Total=506 [2023-08-27 07:39:03,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 486 [2023-08-27 07:39:03,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 612 transitions, 13863 flow. Second operand has 23 states, 23 states have (on average 138.95652173913044) internal successors, (3196), 23 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:03,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:39:03,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 486 [2023-08-27 07:39:03,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:39:09,797 WARN L234 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 61 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:39:21,271 WARN L234 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 87 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:39:28,067 INFO L124 PetriNetUnfolderBase]: 20386/30120 cut-off events. [2023-08-27 07:39:28,068 INFO L125 PetriNetUnfolderBase]: For 962852/962997 co-relation queries the response was YES. [2023-08-27 07:39:28,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292354 conditions, 30120 events. 20386/30120 cut-off events. For 962852/962997 co-relation queries the response was YES. Maximal size of possible extension queue 1350. Compared 198701 event pairs, 2027 based on Foata normal form. 102/27062 useless extension candidates. Maximal degree in co-relation 292259. Up to 11621 conditions per place. [2023-08-27 07:39:28,467 INFO L140 encePairwiseOnDemand]: 468/486 looper letters, 900 selfloop transitions, 339 changer transitions 0/1245 dead transitions. [2023-08-27 07:39:28,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1245 transitions, 27299 flow [2023-08-27 07:39:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 07:39:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 07:39:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3360 transitions. [2023-08-27 07:39:28,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30059044551798175 [2023-08-27 07:39:28,471 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3360 transitions. [2023-08-27 07:39:28,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3360 transitions. [2023-08-27 07:39:28,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:39:28,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3360 transitions. [2023-08-27 07:39:28,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.08695652173913) internal successors, (3360), 23 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:28,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 486.0) internal successors, (11664), 24 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:28,478 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 486.0) internal successors, (11664), 24 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:28,478 INFO L175 Difference]: Start difference. First operand has 268 places, 612 transitions, 13863 flow. Second operand 23 states and 3360 transitions. [2023-08-27 07:39:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1245 transitions, 27299 flow [2023-08-27 07:39:35,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1245 transitions, 26834 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-27 07:39:35,184 INFO L231 Difference]: Finished difference. Result has 295 places, 733 transitions, 17505 flow [2023-08-27 07:39:35,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=13462, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=17505, PETRI_PLACES=295, PETRI_TRANSITIONS=733} [2023-08-27 07:39:35,184 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 237 predicate places. [2023-08-27 07:39:35,185 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 733 transitions, 17505 flow [2023-08-27 07:39:35,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 138.95652173913044) internal successors, (3196), 23 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:35,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:39:35,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:39:35,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 07:39:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-27 07:39:35,391 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:39:35,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:39:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash 262548676, now seen corresponding path program 4 times [2023-08-27 07:39:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:39:35,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28086248] [2023-08-27 07:39:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:39:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:39:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:39:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:39:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28086248] [2023-08-27 07:39:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28086248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:39:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305216952] [2023-08-27 07:39:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:39:36,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:39:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:39:36,528 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:39:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 07:39:36,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:39:36,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:39:36,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 07:39:36,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:39:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:39:36,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:39:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:39:37,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:39:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:39:37,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:39:37,184 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1550) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 07:39:39,213 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1549 (Array Int Int)) (v_ArrVal_1550 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1549) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1550) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 07:39:39,231 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:39:39,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2023-08-27 07:39:39,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-27 07:39:39,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-27 07:39:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-08-27 07:39:39,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305216952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:39:39,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:39:39,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2023-08-27 07:39:39,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804223931] [2023-08-27 07:39:39,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:39:39,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 07:39:39,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:39:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 07:39:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=399, Unknown=2, NotChecked=82, Total=552 [2023-08-27 07:39:39,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 486 [2023-08-27 07:39:39,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 733 transitions, 17505 flow. Second operand has 24 states, 24 states have (on average 147.83333333333334) internal successors, (3548), 24 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:39,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:39:39,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 486 [2023-08-27 07:39:39,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:39:48,711 INFO L124 PetriNetUnfolderBase]: 20342/30199 cut-off events. [2023-08-27 07:39:48,712 INFO L125 PetriNetUnfolderBase]: For 1150198/1150312 co-relation queries the response was YES. [2023-08-27 07:39:48,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299717 conditions, 30199 events. 20342/30199 cut-off events. For 1150198/1150312 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 202282 event pairs, 3579 based on Foata normal form. 974/28891 useless extension candidates. Maximal degree in co-relation 299614. Up to 11909 conditions per place. [2023-08-27 07:39:49,270 INFO L140 encePairwiseOnDemand]: 473/486 looper letters, 582 selfloop transitions, 279 changer transitions 1/864 dead transitions. [2023-08-27 07:39:49,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 864 transitions, 19160 flow [2023-08-27 07:39:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 07:39:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 07:39:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2329 transitions. [2023-08-27 07:39:49,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194787379972565 [2023-08-27 07:39:49,273 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2329 transitions. [2023-08-27 07:39:49,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2329 transitions. [2023-08-27 07:39:49,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:39:49,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2329 transitions. [2023-08-27 07:39:49,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.26666666666668) internal successors, (2329), 15 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:49,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 486.0) internal successors, (7776), 16 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:49,280 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 486.0) internal successors, (7776), 16 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:49,280 INFO L175 Difference]: Start difference. First operand has 295 places, 733 transitions, 17505 flow. Second operand 15 states and 2329 transitions. [2023-08-27 07:39:49,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 864 transitions, 19160 flow [2023-08-27 07:39:55,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 864 transitions, 18107 flow, removed 346 selfloop flow, removed 10 redundant places. [2023-08-27 07:39:55,609 INFO L231 Difference]: Finished difference. Result has 300 places, 676 transitions, 14789 flow [2023-08-27 07:39:55,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=13972, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14789, PETRI_PLACES=300, PETRI_TRANSITIONS=676} [2023-08-27 07:39:55,610 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 242 predicate places. [2023-08-27 07:39:55,610 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 676 transitions, 14789 flow [2023-08-27 07:39:55,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.83333333333334) internal successors, (3548), 24 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:55,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:39:55,611 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:39:55,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 07:39:55,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 07:39:55,816 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:39:55,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:39:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -996510138, now seen corresponding path program 1 times [2023-08-27 07:39:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:39:55,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145427059] [2023-08-27 07:39:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:39:55,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:39:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:39:56,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:39:56,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145427059] [2023-08-27 07:39:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145427059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:39:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088031012] [2023-08-27 07:39:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:39:56,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:39:56,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:39:56,789 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:39:56,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 07:39:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:56,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 07:39:56,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:39:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:39:57,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:39:57,274 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:39:57,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2023-08-27 07:39:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:39:57,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088031012] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:39:57,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:39:57,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 6] total 16 [2023-08-27 07:39:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282285658] [2023-08-27 07:39:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:39:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:39:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:39:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:39:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:39:57,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 486 [2023-08-27 07:39:57,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 676 transitions, 14789 flow. Second operand has 5 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:57,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:39:57,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 486 [2023-08-27 07:39:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:40:03,931 INFO L124 PetriNetUnfolderBase]: 20110/29763 cut-off events. [2023-08-27 07:40:03,932 INFO L125 PetriNetUnfolderBase]: For 874490/874604 co-relation queries the response was YES. [2023-08-27 07:40:04,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290389 conditions, 29763 events. 20110/29763 cut-off events. For 874490/874604 co-relation queries the response was YES. Maximal size of possible extension queue 1298. Compared 197706 event pairs, 2890 based on Foata normal form. 228/27338 useless extension candidates. Maximal degree in co-relation 290289. Up to 17614 conditions per place. [2023-08-27 07:40:04,475 INFO L140 encePairwiseOnDemand]: 474/486 looper letters, 496 selfloop transitions, 256 changer transitions 1/755 dead transitions. [2023-08-27 07:40:04,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 755 transitions, 17335 flow [2023-08-27 07:40:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:40:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:40:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 988 transitions. [2023-08-27 07:40:04,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065843621399177 [2023-08-27 07:40:04,477 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 988 transitions. [2023-08-27 07:40:04,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 988 transitions. [2023-08-27 07:40:04,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:40:04,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 988 transitions. [2023-08-27 07:40:04,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:04,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 486.0) internal successors, (2916), 6 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:04,480 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 486.0) internal successors, (2916), 6 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:04,480 INFO L175 Difference]: Start difference. First operand has 300 places, 676 transitions, 14789 flow. Second operand 5 states and 988 transitions. [2023-08-27 07:40:04,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 755 transitions, 17335 flow [2023-08-27 07:40:11,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 755 transitions, 17019 flow, removed 55 selfloop flow, removed 9 redundant places. [2023-08-27 07:40:11,080 INFO L231 Difference]: Finished difference. Result has 295 places, 670 transitions, 14881 flow [2023-08-27 07:40:11,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14369, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=14881, PETRI_PLACES=295, PETRI_TRANSITIONS=670} [2023-08-27 07:40:11,081 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 237 predicate places. [2023-08-27 07:40:11,081 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 670 transitions, 14881 flow [2023-08-27 07:40:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:11,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:40:11,081 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:40:11,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 07:40:11,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 07:40:11,282 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:40:11,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:40:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1162743918, now seen corresponding path program 2 times [2023-08-27 07:40:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:40:11,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532869303] [2023-08-27 07:40:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:40:11,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:40:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:40:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:40:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:40:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532869303] [2023-08-27 07:40:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532869303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:40:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246740376] [2023-08-27 07:40:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:40:12,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:40:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:40:12,559 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:40:12,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 07:40:12,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:40:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:40:12,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:40:12,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:40:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:40:12,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:40:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:40:12,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:40:12,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246740376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:40:12,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:40:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-08-27 07:40:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590352173] [2023-08-27 07:40:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:40:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:40:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:40:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:40:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:40:12,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 486 [2023-08-27 07:40:12,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 670 transitions, 14881 flow. Second operand has 7 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:12,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:40:12,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 486 [2023-08-27 07:40:12,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:40:19,964 INFO L124 PetriNetUnfolderBase]: 20096/29718 cut-off events. [2023-08-27 07:40:19,964 INFO L125 PetriNetUnfolderBase]: For 901652/901766 co-relation queries the response was YES. [2023-08-27 07:40:20,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293351 conditions, 29718 events. 20096/29718 cut-off events. For 901652/901766 co-relation queries the response was YES. Maximal size of possible extension queue 1231. Compared 196867 event pairs, 4230 based on Foata normal form. 132/27197 useless extension candidates. Maximal degree in co-relation 293251. Up to 20363 conditions per place. [2023-08-27 07:40:20,364 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 581 selfloop transitions, 176 changer transitions 0/759 dead transitions. [2023-08-27 07:40:20,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 759 transitions, 17547 flow [2023-08-27 07:40:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:40:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:40:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1118 transitions. [2023-08-27 07:40:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3834019204389575 [2023-08-27 07:40:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1118 transitions. [2023-08-27 07:40:20,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1118 transitions. [2023-08-27 07:40:20,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:40:20,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1118 transitions. [2023-08-27 07:40:20,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:20,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:20,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:20,369 INFO L175 Difference]: Start difference. First operand has 295 places, 670 transitions, 14881 flow. Second operand 6 states and 1118 transitions. [2023-08-27 07:40:20,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 759 transitions, 17547 flow [2023-08-27 07:40:27,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 759 transitions, 17237 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-27 07:40:27,102 INFO L231 Difference]: Finished difference. Result has 297 places, 670 transitions, 15066 flow [2023-08-27 07:40:27,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14574, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15066, PETRI_PLACES=297, PETRI_TRANSITIONS=670} [2023-08-27 07:40:27,103 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 239 predicate places. [2023-08-27 07:40:27,103 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 670 transitions, 15066 flow [2023-08-27 07:40:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:27,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:40:27,103 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:40:27,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 07:40:27,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:40:27,309 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:40:27,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:40:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1404935439, now seen corresponding path program 1 times [2023-08-27 07:40:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:40:27,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664823022] [2023-08-27 07:40:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:40:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:40:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:40:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:40:29,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:40:29,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664823022] [2023-08-27 07:40:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664823022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:40:29,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065720799] [2023-08-27 07:40:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:40:29,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:40:29,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:40:29,437 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:40:29,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 07:40:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:40:29,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 07:40:29,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:40:29,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:40:29,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:40:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:40:30,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:40:30,127 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1732 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1732) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-08-27 07:40:30,149 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:40:30,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-27 07:40:30,165 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-27 07:40:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:40:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065720799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:40:30,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:40:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 24 [2023-08-27 07:40:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352933236] [2023-08-27 07:40:30,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:40:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 07:40:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:40:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 07:40:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2023-08-27 07:40:30,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 486 [2023-08-27 07:40:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 670 transitions, 15066 flow. Second operand has 26 states, 26 states have (on average 144.69230769230768) internal successors, (3762), 26 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:40:30,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 486 [2023-08-27 07:40:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:40:38,807 INFO L124 PetriNetUnfolderBase]: 19439/28611 cut-off events. [2023-08-27 07:40:38,807 INFO L125 PetriNetUnfolderBase]: For 957266/957416 co-relation queries the response was YES. [2023-08-27 07:40:39,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287083 conditions, 28611 events. 19439/28611 cut-off events. For 957266/957416 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 186390 event pairs, 2005 based on Foata normal form. 546/26763 useless extension candidates. Maximal degree in co-relation 286983. Up to 10890 conditions per place. [2023-08-27 07:40:39,338 INFO L140 encePairwiseOnDemand]: 471/486 looper letters, 579 selfloop transitions, 278 changer transitions 2/861 dead transitions. [2023-08-27 07:40:39,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 861 transitions, 19234 flow [2023-08-27 07:40:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 07:40:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 07:40:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2410 transitions. [2023-08-27 07:40:39,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3099279835390947 [2023-08-27 07:40:39,341 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2410 transitions. [2023-08-27 07:40:39,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2410 transitions. [2023-08-27 07:40:39,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:40:39,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2410 transitions. [2023-08-27 07:40:39,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 150.625) internal successors, (2410), 16 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:39,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 486.0) internal successors, (8262), 17 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:39,348 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 486.0) internal successors, (8262), 17 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:39,348 INFO L175 Difference]: Start difference. First operand has 297 places, 670 transitions, 15066 flow. Second operand 16 states and 2410 transitions. [2023-08-27 07:40:39,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 861 transitions, 19234 flow [2023-08-27 07:40:45,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 861 transitions, 18988 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-27 07:40:45,639 INFO L231 Difference]: Finished difference. Result has 310 places, 677 transitions, 15458 flow [2023-08-27 07:40:45,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14331, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=15458, PETRI_PLACES=310, PETRI_TRANSITIONS=677} [2023-08-27 07:40:45,639 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 252 predicate places. [2023-08-27 07:40:45,639 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 677 transitions, 15458 flow [2023-08-27 07:40:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 144.69230769230768) internal successors, (3762), 26 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:45,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:40:45,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:40:45,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 07:40:45,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 07:40:45,841 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:40:45,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:40:45,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2099894868, now seen corresponding path program 1 times [2023-08-27 07:40:45,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:40:45,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012563416] [2023-08-27 07:40:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:40:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:40:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:40:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:40:46,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:40:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012563416] [2023-08-27 07:40:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012563416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:40:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036037540] [2023-08-27 07:40:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:40:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:40:46,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:40:46,795 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:40:46,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 07:40:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:40:46,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 07:40:46,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:40:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:40:47,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:40:47,350 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:40:47,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-08-27 07:40:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:40:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036037540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:40:47,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:40:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2023-08-27 07:40:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258408993] [2023-08-27 07:40:47,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:40:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:40:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:40:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:40:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:40:47,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 486 [2023-08-27 07:40:47,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 677 transitions, 15458 flow. Second operand has 19 states, 19 states have (on average 139.21052631578948) internal successors, (2645), 19 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:47,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:40:47,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 486 [2023-08-27 07:40:47,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:40:56,033 INFO L124 PetriNetUnfolderBase]: 19567/29144 cut-off events. [2023-08-27 07:40:56,033 INFO L125 PetriNetUnfolderBase]: For 962820/963001 co-relation queries the response was YES. [2023-08-27 07:40:56,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298582 conditions, 29144 events. 19567/29144 cut-off events. For 962820/963001 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 193504 event pairs, 3149 based on Foata normal form. 824/27291 useless extension candidates. Maximal degree in co-relation 298480. Up to 11525 conditions per place. [2023-08-27 07:40:56,511 INFO L140 encePairwiseOnDemand]: 473/486 looper letters, 726 selfloop transitions, 211 changer transitions 0/943 dead transitions. [2023-08-27 07:40:56,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 943 transitions, 21601 flow [2023-08-27 07:40:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 07:40:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 07:40:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2193 transitions. [2023-08-27 07:40:56,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3008230452674897 [2023-08-27 07:40:56,514 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2193 transitions. [2023-08-27 07:40:56,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2193 transitions. [2023-08-27 07:40:56,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:40:56,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2193 transitions. [2023-08-27 07:40:56,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 146.2) internal successors, (2193), 15 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:56,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 486.0) internal successors, (7776), 16 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:56,518 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 486.0) internal successors, (7776), 16 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:56,518 INFO L175 Difference]: Start difference. First operand has 310 places, 677 transitions, 15458 flow. Second operand 15 states and 2193 transitions. [2023-08-27 07:40:56,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 943 transitions, 21601 flow [2023-08-27 07:41:02,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 943 transitions, 20780 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-27 07:41:02,019 INFO L231 Difference]: Finished difference. Result has 316 places, 681 transitions, 15382 flow [2023-08-27 07:41:02,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14727, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15382, PETRI_PLACES=316, PETRI_TRANSITIONS=681} [2023-08-27 07:41:02,020 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 258 predicate places. [2023-08-27 07:41:02,020 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 681 transitions, 15382 flow [2023-08-27 07:41:02,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.21052631578948) internal successors, (2645), 19 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:02,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:41:02,021 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:41:02,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 07:41:02,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 07:41:02,222 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:41:02,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:41:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1929346597, now seen corresponding path program 2 times [2023-08-27 07:41:02,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:41:02,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296120677] [2023-08-27 07:41:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:41:02,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:41:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:41:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:41:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:41:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296120677] [2023-08-27 07:41:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296120677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:41:03,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091857279] [2023-08-27 07:41:03,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:41:03,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:41:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:41:03,460 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:41:03,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 07:41:03,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:41:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:41:03,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:41:03,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:41:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:41:03,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:41:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:41:03,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:41:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091857279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:41:03,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:41:03,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-08-27 07:41:03,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838446684] [2023-08-27 07:41:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:41:03,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:41:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:41:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:41:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:41:03,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 486 [2023-08-27 07:41:03,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 681 transitions, 15382 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:03,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:41:03,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 486 [2023-08-27 07:41:03,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:41:10,747 INFO L124 PetriNetUnfolderBase]: 20163/29642 cut-off events. [2023-08-27 07:41:10,747 INFO L125 PetriNetUnfolderBase]: For 1016431/1016581 co-relation queries the response was YES. [2023-08-27 07:41:11,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303947 conditions, 29642 events. 20163/29642 cut-off events. For 1016431/1016581 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 193900 event pairs, 4289 based on Foata normal form. 300/27190 useless extension candidates. Maximal degree in co-relation 303843. Up to 20683 conditions per place. [2023-08-27 07:41:11,289 INFO L140 encePairwiseOnDemand]: 477/486 looper letters, 650 selfloop transitions, 112 changer transitions 2/766 dead transitions. [2023-08-27 07:41:11,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 766 transitions, 17924 flow [2023-08-27 07:41:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:41:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:41:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1113 transitions. [2023-08-27 07:41:11,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816872427983539 [2023-08-27 07:41:11,291 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1113 transitions. [2023-08-27 07:41:11,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1113 transitions. [2023-08-27 07:41:11,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:41:11,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1113 transitions. [2023-08-27 07:41:11,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.5) internal successors, (1113), 6 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:11,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:11,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:11,295 INFO L175 Difference]: Start difference. First operand has 316 places, 681 transitions, 15382 flow. Second operand 6 states and 1113 transitions. [2023-08-27 07:41:11,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 766 transitions, 17924 flow [2023-08-27 07:41:17,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 766 transitions, 17544 flow, removed 42 selfloop flow, removed 9 redundant places. [2023-08-27 07:41:17,855 INFO L231 Difference]: Finished difference. Result has 312 places, 673 transitions, 14976 flow [2023-08-27 07:41:17,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14752, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14976, PETRI_PLACES=312, PETRI_TRANSITIONS=673} [2023-08-27 07:41:17,855 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 254 predicate places. [2023-08-27 07:41:17,855 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 673 transitions, 14976 flow [2023-08-27 07:41:17,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:17,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:41:17,856 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:41:17,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 07:41:18,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 07:41:18,056 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:41:18,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:41:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1928810359, now seen corresponding path program 1 times [2023-08-27 07:41:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:41:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335057179] [2023-08-27 07:41:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:41:18,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:41:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:41:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:41:19,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:41:19,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335057179] [2023-08-27 07:41:19,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335057179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:41:19,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713623942] [2023-08-27 07:41:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:41:19,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:41:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:41:19,228 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:41:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 07:41:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:41:19,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 07:41:19,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:41:19,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:41:19,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:41:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:41:19,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:41:19,954 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:41:19,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-27 07:41:19,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-27 07:41:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:41:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713623942] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:41:20,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:41:20,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8] total 23 [2023-08-27 07:41:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772886336] [2023-08-27 07:41:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:41:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:41:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:41:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:41:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=518, Unknown=3, NotChecked=0, Total=600 [2023-08-27 07:41:20,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 486 [2023-08-27 07:41:20,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 673 transitions, 14976 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:20,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:41:20,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 486 [2023-08-27 07:41:20,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:41:27,614 INFO L124 PetriNetUnfolderBase]: 20235/29810 cut-off events. [2023-08-27 07:41:27,614 INFO L125 PetriNetUnfolderBase]: For 969204/969354 co-relation queries the response was YES. [2023-08-27 07:41:27,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303048 conditions, 29810 events. 20235/29810 cut-off events. For 969204/969354 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 194725 event pairs, 2246 based on Foata normal form. 165/27101 useless extension candidates. Maximal degree in co-relation 302945. Up to 17200 conditions per place. [2023-08-27 07:41:28,160 INFO L140 encePairwiseOnDemand]: 473/486 looper letters, 523 selfloop transitions, 262 changer transitions 2/789 dead transitions. [2023-08-27 07:41:28,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 789 transitions, 18419 flow [2023-08-27 07:41:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:41:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:41:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1294 transitions. [2023-08-27 07:41:28,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803644914756026 [2023-08-27 07:41:28,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1294 transitions. [2023-08-27 07:41:28,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1294 transitions. [2023-08-27 07:41:28,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:41:28,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1294 transitions. [2023-08-27 07:41:28,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:28,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 486.0) internal successors, (3888), 8 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:28,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 486.0) internal successors, (3888), 8 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:28,164 INFO L175 Difference]: Start difference. First operand has 312 places, 673 transitions, 14976 flow. Second operand 7 states and 1294 transitions. [2023-08-27 07:41:28,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 789 transitions, 18419 flow [2023-08-27 07:41:34,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 789 transitions, 18378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:41:34,482 INFO L231 Difference]: Finished difference. Result has 319 places, 683 transitions, 16231 flow [2023-08-27 07:41:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14935, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16231, PETRI_PLACES=319, PETRI_TRANSITIONS=683} [2023-08-27 07:41:34,483 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 261 predicate places. [2023-08-27 07:41:34,483 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 683 transitions, 16231 flow [2023-08-27 07:41:34,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:34,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:41:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:41:34,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 07:41:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:41:34,689 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:41:34,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:41:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1404946971, now seen corresponding path program 3 times [2023-08-27 07:41:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:41:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356749130] [2023-08-27 07:41:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:41:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:41:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:41:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:41:36,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:41:36,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356749130] [2023-08-27 07:41:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356749130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:41:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506187350] [2023-08-27 07:41:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:41:36,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:41:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:41:36,348 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:41:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 07:41:36,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 07:41:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:41:36,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:41:36,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:41:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:41:36,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:41:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:41:36,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:41:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:41:36,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:41:36,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506187350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:41:36,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:41:36,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 18 [2023-08-27 07:41:36,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133763329] [2023-08-27 07:41:36,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:41:36,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:41:36,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:41:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:41:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:41:36,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 486 [2023-08-27 07:41:36,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 683 transitions, 16231 flow. Second operand has 8 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:36,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:41:36,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 486 [2023-08-27 07:41:36,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:41:43,867 INFO L124 PetriNetUnfolderBase]: 19855/29195 cut-off events. [2023-08-27 07:41:43,867 INFO L125 PetriNetUnfolderBase]: For 1093407/1093557 co-relation queries the response was YES. [2023-08-27 07:41:44,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306010 conditions, 29195 events. 19855/29195 cut-off events. For 1093407/1093557 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 189491 event pairs, 3310 based on Foata normal form. 300/26637 useless extension candidates. Maximal degree in co-relation 305903. Up to 13874 conditions per place. [2023-08-27 07:41:44,280 INFO L140 encePairwiseOnDemand]: 478/486 looper letters, 601 selfloop transitions, 138 changer transitions 2/743 dead transitions. [2023-08-27 07:41:44,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 743 transitions, 18315 flow [2023-08-27 07:41:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:41:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:41:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1095 transitions. [2023-08-27 07:41:44,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37551440329218105 [2023-08-27 07:41:44,281 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1095 transitions. [2023-08-27 07:41:44,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1095 transitions. [2023-08-27 07:41:44,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:41:44,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1095 transitions. [2023-08-27 07:41:44,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:44,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:44,284 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:44,284 INFO L175 Difference]: Start difference. First operand has 319 places, 683 transitions, 16231 flow. Second operand 6 states and 1095 transitions. [2023-08-27 07:41:44,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 743 transitions, 18315 flow [2023-08-27 07:41:50,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 743 transitions, 17096 flow, removed 40 selfloop flow, removed 12 redundant places. [2023-08-27 07:41:50,751 INFO L231 Difference]: Finished difference. Result has 312 places, 675 transitions, 14937 flow [2023-08-27 07:41:50,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14661, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14937, PETRI_PLACES=312, PETRI_TRANSITIONS=675} [2023-08-27 07:41:50,752 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 254 predicate places. [2023-08-27 07:41:50,752 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 675 transitions, 14937 flow [2023-08-27 07:41:50,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:50,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:41:50,752 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:41:50,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 07:41:50,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-27 07:41:50,953 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:41:50,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:41:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1685217399, now seen corresponding path program 2 times [2023-08-27 07:41:50,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:41:50,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830817004] [2023-08-27 07:41:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:41:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:41:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:41:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:41:52,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:41:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830817004] [2023-08-27 07:41:52,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830817004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:41:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593586258] [2023-08-27 07:41:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:41:52,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:41:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:41:52,099 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:41:52,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 07:41:52,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:41:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:41:52,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:41:52,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:41:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:41:52,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:41:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:41:52,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:41:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:41:52,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:41:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593586258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:41:52,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:41:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 07:41:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293974124] [2023-08-27 07:41:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:41:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:41:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:41:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:41:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:41:52,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 486 [2023-08-27 07:41:52,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 675 transitions, 14937 flow. Second operand has 8 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:52,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:41:52,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 486 [2023-08-27 07:41:52,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:41:59,391 INFO L124 PetriNetUnfolderBase]: 19843/29173 cut-off events. [2023-08-27 07:41:59,392 INFO L125 PetriNetUnfolderBase]: For 947921/948071 co-relation queries the response was YES. [2023-08-27 07:41:59,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298037 conditions, 29173 events. 19843/29173 cut-off events. For 947921/948071 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 189592 event pairs, 3453 based on Foata normal form. 165/26480 useless extension candidates. Maximal degree in co-relation 297936. Up to 17423 conditions per place. [2023-08-27 07:41:59,813 INFO L140 encePairwiseOnDemand]: 478/486 looper letters, 554 selfloop transitions, 187 changer transitions 2/745 dead transitions. [2023-08-27 07:41:59,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 745 transitions, 17285 flow [2023-08-27 07:41:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:41:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:41:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1100 transitions. [2023-08-27 07:41:59,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772290809327846 [2023-08-27 07:41:59,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1100 transitions. [2023-08-27 07:41:59,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1100 transitions. [2023-08-27 07:41:59,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:41:59,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1100 transitions. [2023-08-27 07:41:59,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:59,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:59,817 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:59,817 INFO L175 Difference]: Start difference. First operand has 312 places, 675 transitions, 14937 flow. Second operand 6 states and 1100 transitions. [2023-08-27 07:41:59,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 745 transitions, 17285 flow [2023-08-27 07:42:05,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 745 transitions, 17128 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-27 07:42:05,937 INFO L231 Difference]: Finished difference. Result has 312 places, 673 transitions, 15258 flow [2023-08-27 07:42:05,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14731, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15258, PETRI_PLACES=312, PETRI_TRANSITIONS=673} [2023-08-27 07:42:05,938 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 254 predicate places. [2023-08-27 07:42:05,938 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 673 transitions, 15258 flow [2023-08-27 07:42:05,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.625) internal successors, (1381), 8 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:05,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:42:05,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:42:05,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 07:42:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:06,139 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:42:06,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:42:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 781067653, now seen corresponding path program 1 times [2023-08-27 07:42:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:42:06,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831112767] [2023-08-27 07:42:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:42:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:42:06,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:42:06,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831112767] [2023-08-27 07:42:06,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831112767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:42:06,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708909409] [2023-08-27 07:42:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:06,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:42:06,261 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:42:06,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 07:42:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:06,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:42:06,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:42:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:42:06,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:42:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:42:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708909409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:42:06,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:42:06,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 14 [2023-08-27 07:42:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436104362] [2023-08-27 07:42:06,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:42:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:42:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:42:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:42:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:42:06,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 486 [2023-08-27 07:42:06,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 673 transitions, 15258 flow. Second operand has 16 states, 16 states have (on average 179.6875) internal successors, (2875), 16 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:06,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:42:06,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 486 [2023-08-27 07:42:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:42:15,087 INFO L124 PetriNetUnfolderBase]: 22779/33569 cut-off events. [2023-08-27 07:42:15,087 INFO L125 PetriNetUnfolderBase]: For 1300128/1300309 co-relation queries the response was YES. [2023-08-27 07:42:15,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362532 conditions, 33569 events. 22779/33569 cut-off events. For 1300128/1300309 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 219640 event pairs, 3840 based on Foata normal form. 1284/31565 useless extension candidates. Maximal degree in co-relation 362429. Up to 12504 conditions per place. [2023-08-27 07:42:15,787 INFO L140 encePairwiseOnDemand]: 473/486 looper letters, 501 selfloop transitions, 144 changer transitions 290/940 dead transitions. [2023-08-27 07:42:15,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 940 transitions, 21654 flow [2023-08-27 07:42:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 07:42:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 07:42:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2436 transitions. [2023-08-27 07:42:15,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855650522317189 [2023-08-27 07:42:15,789 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2436 transitions. [2023-08-27 07:42:15,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2436 transitions. [2023-08-27 07:42:15,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:42:15,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2436 transitions. [2023-08-27 07:42:15,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.3846153846154) internal successors, (2436), 13 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:15,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 486.0) internal successors, (6804), 14 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:15,793 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 486.0) internal successors, (6804), 14 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:15,793 INFO L175 Difference]: Start difference. First operand has 312 places, 673 transitions, 15258 flow. Second operand 13 states and 2436 transitions. [2023-08-27 07:42:15,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 940 transitions, 21654 flow [2023-08-27 07:42:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 940 transitions, 20977 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-27 07:42:23,686 INFO L231 Difference]: Finished difference. Result has 318 places, 504 transitions, 11291 flow [2023-08-27 07:42:23,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=14649, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11291, PETRI_PLACES=318, PETRI_TRANSITIONS=504} [2023-08-27 07:42:23,687 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 260 predicate places. [2023-08-27 07:42:23,687 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 504 transitions, 11291 flow [2023-08-27 07:42:23,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 179.6875) internal successors, (2875), 16 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:23,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:42:23,687 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:42:23,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-27 07:42:23,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-27 07:42:23,888 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:42:23,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:42:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1905191135, now seen corresponding path program 1 times [2023-08-27 07:42:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:42:23,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658876867] [2023-08-27 07:42:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:42:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:42:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:42:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658876867] [2023-08-27 07:42:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658876867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:42:24,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815787038] [2023-08-27 07:42:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:24,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:42:24,854 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:42:24,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 07:42:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:25,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 07:42:25,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:42:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:42:25,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 07:42:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:42:25,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:42:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815787038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:42:25,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:42:25,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 07:42:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246592912] [2023-08-27 07:42:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:42:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:42:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:42:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:42:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:42:25,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 486 [2023-08-27 07:42:25,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 504 transitions, 11291 flow. Second operand has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:25,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:42:25,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 486 [2023-08-27 07:42:25,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:42:31,424 INFO L124 PetriNetUnfolderBase]: 19522/28444 cut-off events. [2023-08-27 07:42:31,425 INFO L125 PetriNetUnfolderBase]: For 1051274/1051445 co-relation queries the response was YES. [2023-08-27 07:42:31,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322887 conditions, 28444 events. 19522/28444 cut-off events. For 1051274/1051445 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 178500 event pairs, 4407 based on Foata normal form. 152/25556 useless extension candidates. Maximal degree in co-relation 322784. Up to 22166 conditions per place. [2023-08-27 07:42:31,932 INFO L140 encePairwiseOnDemand]: 479/486 looper letters, 425 selfloop transitions, 101 changer transitions 0/531 dead transitions. [2023-08-27 07:42:31,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 531 transitions, 12689 flow [2023-08-27 07:42:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:42:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:42:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 703 transitions. [2023-08-27 07:42:31,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36162551440329216 [2023-08-27 07:42:31,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 703 transitions. [2023-08-27 07:42:31,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 703 transitions. [2023-08-27 07:42:31,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:42:31,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 703 transitions. [2023-08-27 07:42:31,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:31,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:31,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:31,936 INFO L175 Difference]: Start difference. First operand has 318 places, 504 transitions, 11291 flow. Second operand 4 states and 703 transitions. [2023-08-27 07:42:31,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 531 transitions, 12689 flow [2023-08-27 07:42:37,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 531 transitions, 12004 flow, removed 173 selfloop flow, removed 20 redundant places. [2023-08-27 07:42:37,426 INFO L231 Difference]: Finished difference. Result has 291 places, 508 transitions, 10981 flow [2023-08-27 07:42:37,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=10624, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=10981, PETRI_PLACES=291, PETRI_TRANSITIONS=508} [2023-08-27 07:42:37,427 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 233 predicate places. [2023-08-27 07:42:37,427 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 508 transitions, 10981 flow [2023-08-27 07:42:37,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:37,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:42:37,428 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:42:37,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 07:42:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:37,628 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:42:37,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:42:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1744679882, now seen corresponding path program 2 times [2023-08-27 07:42:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:42:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991015239] [2023-08-27 07:42:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:37,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:42:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:42:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:42:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991015239] [2023-08-27 07:42:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991015239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:42:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90321533] [2023-08-27 07:42:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:42:39,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:42:39,365 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:42:39,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 07:42:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:42:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:42:39,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 07:42:39,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:42:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:42:40,078 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-27 07:42:40,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 38 [2023-08-27 07:42:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:42:40,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:42:40,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90321533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:42:40,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:42:40,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-27 07:42:40,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63619452] [2023-08-27 07:42:40,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:42:40,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 07:42:40,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:42:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 07:42:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:42:40,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 486 [2023-08-27 07:42:40,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 508 transitions, 10981 flow. Second operand has 9 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:40,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:42:40,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 486 [2023-08-27 07:42:40,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:42:48,554 INFO L124 PetriNetUnfolderBase]: 26797/38003 cut-off events. [2023-08-27 07:42:48,555 INFO L125 PetriNetUnfolderBase]: For 1056796/1056946 co-relation queries the response was YES. [2023-08-27 07:42:49,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413764 conditions, 38003 events. 26797/38003 cut-off events. For 1056796/1056946 co-relation queries the response was YES. Maximal size of possible extension queue 1489. Compared 234601 event pairs, 4909 based on Foata normal form. 660/34211 useless extension candidates. Maximal degree in co-relation 413668. Up to 29600 conditions per place. [2023-08-27 07:42:49,296 INFO L140 encePairwiseOnDemand]: 475/486 looper letters, 568 selfloop transitions, 109 changer transitions 0/679 dead transitions. [2023-08-27 07:42:49,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 679 transitions, 15669 flow [2023-08-27 07:42:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:42:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:42:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1135 transitions. [2023-08-27 07:42:49,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33362727807172254 [2023-08-27 07:42:49,297 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1135 transitions. [2023-08-27 07:42:49,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1135 transitions. [2023-08-27 07:42:49,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:42:49,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1135 transitions. [2023-08-27 07:42:49,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.14285714285714) internal successors, (1135), 7 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:49,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 486.0) internal successors, (3888), 8 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:49,300 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 486.0) internal successors, (3888), 8 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:49,300 INFO L175 Difference]: Start difference. First operand has 291 places, 508 transitions, 10981 flow. Second operand 7 states and 1135 transitions. [2023-08-27 07:42:49,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 679 transitions, 15669 flow [2023-08-27 07:42:53,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 679 transitions, 15509 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 07:42:53,987 INFO L231 Difference]: Finished difference. Result has 298 places, 548 transitions, 12043 flow [2023-08-27 07:42:53,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12043, PETRI_PLACES=298, PETRI_TRANSITIONS=548} [2023-08-27 07:42:53,988 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 240 predicate places. [2023-08-27 07:42:53,988 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 548 transitions, 12043 flow [2023-08-27 07:42:53,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:53,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:42:53,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:42:53,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-27 07:42:54,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-27 07:42:54,189 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:42:54,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:42:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2134341956, now seen corresponding path program 3 times [2023-08-27 07:42:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:42:54,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572183905] [2023-08-27 07:42:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:54,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:42:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:42:57,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:42:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572183905] [2023-08-27 07:42:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572183905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:42:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187985635] [2023-08-27 07:42:57,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:42:57,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:42:57,512 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:42:57,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 07:42:57,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 07:42:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:42:57,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 07:42:57,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:42:58,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:42:58,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:42:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:42:58,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:42:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187985635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:42:58,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:42:58,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-08-27 07:42:58,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076151710] [2023-08-27 07:42:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:42:58,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:42:58,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:42:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:42:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:42:58,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 486 [2023-08-27 07:42:58,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 548 transitions, 12043 flow. Second operand has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:58,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:42:58,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 486 [2023-08-27 07:42:58,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:43:06,074 INFO L124 PetriNetUnfolderBase]: 25699/36697 cut-off events. [2023-08-27 07:43:06,074 INFO L125 PetriNetUnfolderBase]: For 1109162/1109333 co-relation queries the response was YES. [2023-08-27 07:43:06,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413091 conditions, 36697 events. 25699/36697 cut-off events. For 1109162/1109333 co-relation queries the response was YES. Maximal size of possible extension queue 1379. Compared 225714 event pairs, 3530 based on Foata normal form. 644/33065 useless extension candidates. Maximal degree in co-relation 412992. Up to 16916 conditions per place. [2023-08-27 07:43:06,751 INFO L140 encePairwiseOnDemand]: 479/486 looper letters, 450 selfloop transitions, 157 changer transitions 0/612 dead transitions. [2023-08-27 07:43:06,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 612 transitions, 14573 flow [2023-08-27 07:43:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:43:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:43:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2023-08-27 07:43:06,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36522633744855965 [2023-08-27 07:43:06,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2023-08-27 07:43:06,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2023-08-27 07:43:06,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:43:06,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2023-08-27 07:43:06,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:06,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:06,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 486.0) internal successors, (2430), 5 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:06,754 INFO L175 Difference]: Start difference. First operand has 298 places, 548 transitions, 12043 flow. Second operand 4 states and 710 transitions. [2023-08-27 07:43:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 612 transitions, 14573 flow [2023-08-27 07:43:10,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 612 transitions, 14338 flow, removed 48 selfloop flow, removed 3 redundant places. [2023-08-27 07:43:10,876 INFO L231 Difference]: Finished difference. Result has 299 places, 550 transitions, 12352 flow [2023-08-27 07:43:10,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=11724, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=12352, PETRI_PLACES=299, PETRI_TRANSITIONS=550} [2023-08-27 07:43:10,876 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 241 predicate places. [2023-08-27 07:43:10,876 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 550 transitions, 12352 flow [2023-08-27 07:43:10,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:10,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:43:10,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:43:10,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-27 07:43:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 07:43:11,077 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:43:11,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:43:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1425837950, now seen corresponding path program 1 times [2023-08-27 07:43:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:43:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845043164] [2023-08-27 07:43:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:43:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:43:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:43:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:43:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:43:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845043164] [2023-08-27 07:43:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845043164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:43:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41781629] [2023-08-27 07:43:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:43:13,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:43:13,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:43:13,207 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:43:13,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 07:43:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:43:13,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 07:43:13,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:43:13,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:43:13,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 07:43:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 07:43:13,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:43:14,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:43:14,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2023-08-27 07:43:14,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-27 07:43:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:43:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41781629] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:43:14,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:43:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 21 [2023-08-27 07:43:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269982506] [2023-08-27 07:43:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:43:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:43:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:43:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:43:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=441, Unknown=3, NotChecked=0, Total=506 [2023-08-27 07:43:14,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 486 [2023-08-27 07:43:14,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 550 transitions, 12352 flow. Second operand has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:14,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:43:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 486 [2023-08-27 07:43:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:43:21,694 INFO L124 PetriNetUnfolderBase]: 23375/33643 cut-off events. [2023-08-27 07:43:21,694 INFO L125 PetriNetUnfolderBase]: For 1042300/1042471 co-relation queries the response was YES. [2023-08-27 07:43:22,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383805 conditions, 33643 events. 23375/33643 cut-off events. For 1042300/1042471 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 206996 event pairs, 3171 based on Foata normal form. 1274/30711 useless extension candidates. Maximal degree in co-relation 383705. Up to 13766 conditions per place. [2023-08-27 07:43:22,478 INFO L140 encePairwiseOnDemand]: 479/486 looper letters, 451 selfloop transitions, 164 changer transitions 14/634 dead transitions. [2023-08-27 07:43:22,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 634 transitions, 15211 flow [2023-08-27 07:43:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:43:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:43:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 888 transitions. [2023-08-27 07:43:22,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654320987654321 [2023-08-27 07:43:22,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 888 transitions. [2023-08-27 07:43:22,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 888 transitions. [2023-08-27 07:43:22,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:43:22,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 888 transitions. [2023-08-27 07:43:22,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:22,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 486.0) internal successors, (2916), 6 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:22,481 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 486.0) internal successors, (2916), 6 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:22,481 INFO L175 Difference]: Start difference. First operand has 299 places, 550 transitions, 12352 flow. Second operand 5 states and 888 transitions. [2023-08-27 07:43:22,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 634 transitions, 15211 flow [2023-08-27 07:43:27,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 634 transitions, 14925 flow, removed 57 selfloop flow, removed 4 redundant places. [2023-08-27 07:43:27,594 INFO L231 Difference]: Finished difference. Result has 296 places, 516 transitions, 11529 flow [2023-08-27 07:43:27,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=11540, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11529, PETRI_PLACES=296, PETRI_TRANSITIONS=516} [2023-08-27 07:43:27,594 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 238 predicate places. [2023-08-27 07:43:27,594 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 516 transitions, 11529 flow [2023-08-27 07:43:27,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:27,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:43:27,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:43:27,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 07:43:27,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 07:43:27,796 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:43:27,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:43:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1075827247, now seen corresponding path program 1 times [2023-08-27 07:43:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:43:27,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766820954] [2023-08-27 07:43:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:43:27,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:43:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:43:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:43:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:43:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766820954] [2023-08-27 07:43:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766820954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:43:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544635129] [2023-08-27 07:43:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:43:28,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:43:28,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:43:28,324 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:43:28,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 07:43:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:43:28,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 07:43:28,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:43:28,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:43:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:43:28,614 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 07:43:28,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 07:43:28,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:43:28,843 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:43:28,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 07:43:28,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:43:28,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:43:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:43:29,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:43:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:43:29,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 07:43:29,528 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 07:43:29,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-27 07:43:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:43:29,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:43:30,384 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:43:30,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-08-27 07:43:30,402 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:43:30,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1297 treesize of output 1227 [2023-08-27 07:43:30,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 61 [2023-08-27 07:43:30,422 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2023-08-27 07:43:30,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2023-08-27 07:43:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:43:30,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544635129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:43:30,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:43:30,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2023-08-27 07:43:30,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190669598] [2023-08-27 07:43:30,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:43:30,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 07:43:30,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:43:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 07:43:30,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=865, Unknown=5, NotChecked=0, Total=992 [2023-08-27 07:43:31,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 486 [2023-08-27 07:43:31,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 516 transitions, 11529 flow. Second operand has 32 states, 32 states have (on average 144.5625) internal successors, (4626), 32 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:31,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:43:31,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 486 [2023-08-27 07:43:31,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:43:35,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:43:37,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:43:40,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:43:49,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:43:51,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:43:54,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:43:59,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:44:04,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:44:26,373 INFO L124 PetriNetUnfolderBase]: 50152/72192 cut-off events. [2023-08-27 07:44:26,374 INFO L125 PetriNetUnfolderBase]: For 2344482/2344656 co-relation queries the response was YES. [2023-08-27 07:44:27,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821489 conditions, 72192 events. 50152/72192 cut-off events. For 2344482/2344656 co-relation queries the response was YES. Maximal size of possible extension queue 3203. Compared 507223 event pairs, 3222 based on Foata normal form. 1315/65042 useless extension candidates. Maximal degree in co-relation 821391. Up to 30103 conditions per place. [2023-08-27 07:44:27,961 INFO L140 encePairwiseOnDemand]: 470/486 looper letters, 1317 selfloop transitions, 751 changer transitions 2/2072 dead transitions. [2023-08-27 07:44:27,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 2072 transitions, 49571 flow [2023-08-27 07:44:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-27 07:44:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-27 07:44:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 11085 transitions. [2023-08-27 07:44:27,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31244715034669374 [2023-08-27 07:44:27,969 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 11085 transitions. [2023-08-27 07:44:27,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 11085 transitions. [2023-08-27 07:44:27,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:44:27,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 11085 transitions. [2023-08-27 07:44:27,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 151.84931506849315) internal successors, (11085), 73 states have internal predecessors, (11085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:27,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 486.0) internal successors, (35964), 74 states have internal predecessors, (35964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:27,995 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 486.0) internal successors, (35964), 74 states have internal predecessors, (35964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:27,995 INFO L175 Difference]: Start difference. First operand has 296 places, 516 transitions, 11529 flow. Second operand 73 states and 11085 transitions. [2023-08-27 07:44:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 2072 transitions, 49571 flow [2023-08-27 07:44:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 2072 transitions, 46765 flow, removed 150 selfloop flow, removed 5 redundant places. [2023-08-27 07:44:40,130 INFO L231 Difference]: Finished difference. Result has 387 places, 1066 transitions, 27641 flow [2023-08-27 07:44:40,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=10905, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=27641, PETRI_PLACES=387, PETRI_TRANSITIONS=1066} [2023-08-27 07:44:40,131 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 329 predicate places. [2023-08-27 07:44:40,131 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1066 transitions, 27641 flow [2023-08-27 07:44:40,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 144.5625) internal successors, (4626), 32 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:40,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:44:40,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:44:40,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 07:44:40,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 07:44:40,338 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 45 more)] === [2023-08-27 07:44:40,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:44:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2096928071, now seen corresponding path program 1 times [2023-08-27 07:44:40,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:44:40,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918342758] [2023-08-27 07:44:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:44:40,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:44:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:44:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:44:40,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:44:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918342758] [2023-08-27 07:44:40,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918342758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:44:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379085860] [2023-08-27 07:44:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:44:40,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:44:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:44:40,388 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:44:40,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 07:44:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:44:40,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 07:44:40,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:44:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 07:44:40,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:44:40,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379085860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:44:40,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:44:40,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 07:44:40,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940469574] [2023-08-27 07:44:40,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:44:40,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:44:40,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:44:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:44:40,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:44:40,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 486 [2023-08-27 07:44:40,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1066 transitions, 27641 flow. Second operand has 4 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:40,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:44:40,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 486 [2023-08-27 07:44:40,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand