/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-queue-add-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:28:18,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:28:18,518 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 08:28:18,521 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:28:18,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:28:18,549 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:28:18,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:28:18,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:28:18,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:28:18,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:28:18,553 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:28:18,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:28:18,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:28:18,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:28:18,556 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:28:18,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:28:18,556 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:28:18,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:28:18,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:28:18,557 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:28:18,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:28:18,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:28:18,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:28:18,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:28:18,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:28:18,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:28:18,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:28:18,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:28:18,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:28:18,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:28:18,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:28:18,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:28:18,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:28:18,826 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:28:18,828 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:28:18,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-27 08:28:19,828 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:28:20,000 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:28:20,000 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-27 08:28:20,005 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483b16664/f7ed420ba6a14e8bbb012acfc0d8b75a/FLAGd5e15f5b6 [2023-08-27 08:28:20,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483b16664/f7ed420ba6a14e8bbb012acfc0d8b75a [2023-08-27 08:28:20,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:28:20,017 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:28:20,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:28:20,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:28:20,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:28:20,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1095f9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20, skipping insertion in model container [2023-08-27 08:28:20,020 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,034 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:28:20,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:28:20,179 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:28:20,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:28:20,220 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:28:20,221 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:28:20,225 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:28:20,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20 WrapperNode [2023-08-27 08:28:20,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:28:20,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:28:20,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:28:20,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:28:20,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,275 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 277 [2023-08-27 08:28:20,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:28:20,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:28:20,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:28:20,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:28:20,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,291 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,291 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:28:20,313 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:28:20,313 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:28:20,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:28:20,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (1/1) ... [2023-08-27 08:28:20,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:28:20,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:20,334 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 08:28:20,344 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 08:28:20,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:28:20,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:28:20,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:28:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:28:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:28:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:28:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:28:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:28:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 08:28:20,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 08:28:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:28:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:28:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:28:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:28:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:28:20,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:28:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:28:20,369 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 08:28:20,446 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:28:20,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:28:20,801 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:28:20,935 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:28:20,935 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-27 08:28:20,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:28:20 BoogieIcfgContainer [2023-08-27 08:28:20,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:28:20,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:28:20,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:28:20,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:28:20,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:28:20" (1/3) ... [2023-08-27 08:28:20,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218132b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:28:20, skipping insertion in model container [2023-08-27 08:28:20,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:28:20" (2/3) ... [2023-08-27 08:28:20,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218132b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:28:20, skipping insertion in model container [2023-08-27 08:28:20,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:28:20" (3/3) ... [2023-08-27 08:28:20,943 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-08-27 08:28:20,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:28:20,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-08-27 08:28:20,954 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:28:21,020 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 08:28:21,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 235 transitions, 494 flow [2023-08-27 08:28:21,116 INFO L124 PetriNetUnfolderBase]: 18/232 cut-off events. [2023-08-27 08:28:21,117 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:28:21,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 18/232 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 189. Up to 3 conditions per place. [2023-08-27 08:28:21,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 235 transitions, 494 flow [2023-08-27 08:28:21,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 221 transitions, 460 flow [2023-08-27 08:28:21,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:28:21,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 221 transitions, 460 flow [2023-08-27 08:28:21,142 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 221 transitions, 460 flow [2023-08-27 08:28:21,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 221 transitions, 460 flow [2023-08-27 08:28:21,174 INFO L124 PetriNetUnfolderBase]: 18/221 cut-off events. [2023-08-27 08:28:21,174 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:28:21,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 221 events. 18/221 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 189. Up to 3 conditions per place. [2023-08-27 08:28:21,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 3352 [2023-08-27 08:28:28,030 INFO L134 LiptonReduction]: Checked pairs total: 6384 [2023-08-27 08:28:28,031 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-27 08:28:28,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:28:28,043 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;@28fb70ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:28:28,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-27 08:28:28,045 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:28:28,045 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:28:28,045 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:28:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:28:28,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:28,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 34854, now seen corresponding path program 1 times [2023-08-27 08:28:28,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:28,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386329034] [2023-08-27 08:28:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:28,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:28,242 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 08:28:28,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:28,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386329034] [2023-08-27 08:28:28,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386329034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:28,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:28,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:28:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062971319] [2023-08-27 08:28:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:28,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:28:28,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 473 [2023-08-27 08:28:28,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 08:28:28,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:28,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 473 [2023-08-27 08:28:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:28,664 INFO L124 PetriNetUnfolderBase]: 3113/4030 cut-off events. [2023-08-27 08:28:28,664 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-08-27 08:28:28,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8220 conditions, 4030 events. 3113/4030 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17891 event pairs, 1668 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 7334. Up to 4000 conditions per place. [2023-08-27 08:28:28,687 INFO L140 encePairwiseOnDemand]: 458/473 looper letters, 38 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-27 08:28:28,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 196 flow [2023-08-27 08:28:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-27 08:28:28,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2023-08-27 08:28:28,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-27 08:28:28,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-27 08:28:28,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:28,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-27 08:28:28,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:28:28,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:28,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:28,717 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 114 flow. Second operand 3 states and 605 transitions. [2023-08-27 08:28:28,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 196 flow [2023-08-27 08:28:28,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 08:28:28,726 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 134 flow [2023-08-27 08:28:28,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-27 08:28:28,729 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-27 08:28:28,730 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 134 flow [2023-08-27 08:28:28,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 08:28:28,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:28,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:28:28,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:28:28,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:28,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1081476, now seen corresponding path program 1 times [2023-08-27 08:28:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:28,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949015933] [2023-08-27 08:28:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:28,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:28,804 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 08:28:28,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:28,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949015933] [2023-08-27 08:28:28,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949015933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30347784] [2023-08-27 08:28:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:28,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:28,841 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 08:28:28,869 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 08:28:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:28,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:28:28,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:28,928 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 08:28:28,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:28,944 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 08:28:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30347784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:28,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:28,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:28:28,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792851040] [2023-08-27 08:28:28,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:28,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:28:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:28:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:28:28,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 473 [2023-08-27 08:28:28,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 185.14285714285714) internal successors, (1296), 7 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 08:28:28,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:28,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 473 [2023-08-27 08:28:28,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:29,305 INFO L124 PetriNetUnfolderBase]: 3125/4048 cut-off events. [2023-08-27 08:28:29,305 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-27 08:28:29,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8175 conditions, 4048 events. 3125/4048 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17871 event pairs, 1668 based on Foata normal form. 0/1330 useless extension candidates. Maximal degree in co-relation 8070. Up to 4001 conditions per place. [2023-08-27 08:28:29,321 INFO L140 encePairwiseOnDemand]: 464/473 looper letters, 36 selfloop transitions, 25 changer transitions 0/64 dead transitions. [2023-08-27 08:28:29,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 334 flow [2023-08-27 08:28:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:28:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:28:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1355 transitions. [2023-08-27 08:28:29,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40924192086982786 [2023-08-27 08:28:29,325 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1355 transitions. [2023-08-27 08:28:29,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1355 transitions. [2023-08-27 08:28:29,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:29,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1355 transitions. [2023-08-27 08:28:29,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.57142857142858) internal successors, (1355), 7 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states 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 08:28:29,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:28:29,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:28:29,338 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 134 flow. Second operand 7 states and 1355 transitions. [2023-08-27 08:28:29,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 334 flow [2023-08-27 08:28:29,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:28:29,341 INFO L231 Difference]: Finished difference. Result has 52 places, 64 transitions, 288 flow [2023-08-27 08:28:29,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=52, PETRI_TRANSITIONS=64} [2023-08-27 08:28:29,341 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-27 08:28:29,341 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 64 transitions, 288 flow [2023-08-27 08:28:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.14285714285714) internal successors, (1296), 7 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 08:28:29,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:29,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 08:28:29,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 08:28:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:29,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:29,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash 33526759, now seen corresponding path program 1 times [2023-08-27 08:28:29,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734203546] [2023-08-27 08:28:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:28:29,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:29,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734203546] [2023-08-27 08:28:29,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734203546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:29,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:29,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:28:29,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447938940] [2023-08-27 08:28:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:29,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:29,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:29,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:28:29,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 473 [2023-08-27 08:28:29,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 64 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 08:28:29,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:29,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 473 [2023-08-27 08:28:29,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:29,956 INFO L124 PetriNetUnfolderBase]: 3119/4040 cut-off events. [2023-08-27 08:28:29,957 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-27 08:28:29,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 4040 events. 3119/4040 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17841 event pairs, 1668 based on Foata normal form. 0/1333 useless extension candidates. Maximal degree in co-relation 8119. Up to 3995 conditions per place. [2023-08-27 08:28:29,975 INFO L140 encePairwiseOnDemand]: 469/473 looper letters, 47 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-27 08:28:29,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 340 flow [2023-08-27 08:28:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-27 08:28:29,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2023-08-27 08:28:29,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-27 08:28:29,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-27 08:28:29,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:29,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-27 08:28:29,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 08:28:29,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:29,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:29,981 INFO L175 Difference]: Start difference. First operand has 52 places, 64 transitions, 288 flow. Second operand 3 states and 591 transitions. [2023-08-27 08:28:29,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 340 flow [2023-08-27 08:28:29,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 314 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:29,983 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 220 flow [2023-08-27 08:28:29,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-27 08:28:29,983 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 08:28:29,983 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 220 flow [2023-08-27 08:28:29,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 08:28:29,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:29,984 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:28:29,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 08:28:29,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:29,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2140491866, now seen corresponding path program 2 times [2023-08-27 08:28:29,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791917071] [2023-08-27 08:28:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:29,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:30,071 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 08:28:30,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791917071] [2023-08-27 08:28:30,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791917071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881766219] [2023-08-27 08:28:30,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:28:30,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:30,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:30,073 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 08:28:30,133 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 08:28:30,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:28:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:28:30,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:28:30,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:30,200 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 08:28:30,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:28:30,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881766219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:30,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:28:30,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:28:30,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913338095] [2023-08-27 08:28:30,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:30,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:30,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:28:30,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 473 [2023-08-27 08:28:30,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 08:28:30,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:30,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 473 [2023-08-27 08:28:30,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:30,511 INFO L124 PetriNetUnfolderBase]: 3119/4039 cut-off events. [2023-08-27 08:28:30,511 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-27 08:28:30,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8171 conditions, 4039 events. 3119/4039 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 17839 event pairs, 1668 based on Foata normal form. 1/1336 useless extension candidates. Maximal degree in co-relation 8116. Up to 4006 conditions per place. [2023-08-27 08:28:30,531 INFO L140 encePairwiseOnDemand]: 470/473 looper letters, 46 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-08-27 08:28:30,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 314 flow [2023-08-27 08:28:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-27 08:28:30,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4193093727977449 [2023-08-27 08:28:30,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-27 08:28:30,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-27 08:28:30,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:30,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-27 08:28:30,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states 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 08:28:30,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:30,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:30,540 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 220 flow. Second operand 3 states and 595 transitions. [2023-08-27 08:28:30,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 314 flow [2023-08-27 08:28:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:28:30,542 INFO L231 Difference]: Finished difference. Result has 49 places, 55 transitions, 210 flow [2023-08-27 08:28:30,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=55} [2023-08-27 08:28:30,543 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-27 08:28:30,543 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 55 transitions, 210 flow [2023-08-27 08:28:30,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 08:28:30,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:30,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:28:30,550 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 08:28:30,750 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 08:28:30,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:30,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2116902173, now seen corresponding path program 1 times [2023-08-27 08:28:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:30,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100190535] [2023-08-27 08:28:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:30,817 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 08:28:30,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:30,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100190535] [2023-08-27 08:28:30,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100190535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:30,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:30,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:28:30,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684781779] [2023-08-27 08:28:30,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:30,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:28:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:28:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:28:30,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 473 [2023-08-27 08:28:30,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 55 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 08:28:30,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:30,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 473 [2023-08-27 08:28:30,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:31,128 INFO L124 PetriNetUnfolderBase]: 3125/4070 cut-off events. [2023-08-27 08:28:31,128 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-27 08:28:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 4070 events. 3125/4070 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 18155 event pairs, 1671 based on Foata normal form. 26/1410 useless extension candidates. Maximal degree in co-relation 8175. Up to 4001 conditions per place. [2023-08-27 08:28:31,138 INFO L140 encePairwiseOnDemand]: 462/473 looper letters, 70 selfloop transitions, 3 changer transitions 1/77 dead transitions. [2023-08-27 08:28:31,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 448 flow [2023-08-27 08:28:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:28:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:28:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2023-08-27 08:28:31,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2023-08-27 08:28:31,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2023-08-27 08:28:31,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2023-08-27 08:28:31,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:31,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2023-08-27 08:28:31,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 08:28:31,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:28:31,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:28:31,145 INFO L175 Difference]: Start difference. First operand has 49 places, 55 transitions, 210 flow. Second operand 4 states and 752 transitions. [2023-08-27 08:28:31,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 448 flow [2023-08-27 08:28:31,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:28:31,147 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 221 flow [2023-08-27 08:28:31,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2023-08-27 08:28:31,148 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-27 08:28:31,148 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 221 flow [2023-08-27 08:28:31,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 08:28:31,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:31,148 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 08:28:31,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:28:31,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:31,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1216917241, now seen corresponding path program 1 times [2023-08-27 08:28:31,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:31,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50075155] [2023-08-27 08:28:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:31,206 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 08:28:31,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:31,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50075155] [2023-08-27 08:28:31,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50075155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:31,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657799016] [2023-08-27 08:28:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:31,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:31,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:31,208 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 08:28:31,218 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 08:28:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:31,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 08:28:31,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:31,307 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 08:28:31,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:31,344 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 08:28:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657799016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:31,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:31,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:28:31,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563400984] [2023-08-27 08:28:31,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:28:31,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:28:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:28:31,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 473 [2023-08-27 08:28:31,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 185.15384615384616) internal successors, (2407), 13 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 08:28:31,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:31,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 473 [2023-08-27 08:28:31,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:31,668 INFO L124 PetriNetUnfolderBase]: 3151/4114 cut-off events. [2023-08-27 08:28:31,668 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2023-08-27 08:28:31,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10143 conditions, 4114 events. 3151/4114 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 18303 event pairs, 1672 based on Foata normal form. 12/1387 useless extension candidates. Maximal degree in co-relation 9971. Up to 4045 conditions per place. [2023-08-27 08:28:31,679 INFO L140 encePairwiseOnDemand]: 467/473 looper letters, 35 selfloop transitions, 41 changer transitions 0/79 dead transitions. [2023-08-27 08:28:31,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 511 flow [2023-08-27 08:28:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:28:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:28:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2290 transitions. [2023-08-27 08:28:31,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034531360112755 [2023-08-27 08:28:31,684 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2290 transitions. [2023-08-27 08:28:31,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2290 transitions. [2023-08-27 08:28:31,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:31,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2290 transitions. [2023-08-27 08:28:31,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states 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 08:28:31,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states 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 08:28:31,694 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states 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 08:28:31,694 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 221 flow. Second operand 12 states and 2290 transitions. [2023-08-27 08:28:31,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 511 flow [2023-08-27 08:28:31,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 505 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:31,696 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 489 flow [2023-08-27 08:28:31,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=489, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-27 08:28:31,697 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-08-27 08:28:31,697 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 489 flow [2023-08-27 08:28:31,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.15384615384616) internal successors, (2407), 13 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 08:28:31,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:31,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:31,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 08:28:31,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:31,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:31,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1907147601, now seen corresponding path program 1 times [2023-08-27 08:28:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955910404] [2023-08-27 08:28:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:31,975 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 08:28:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:31,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955910404] [2023-08-27 08:28:31,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955910404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:31,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827728778] [2023-08-27 08:28:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:31,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:31,977 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 08:28:31,979 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 08:28:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:32,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:28:32,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:32,049 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 08:28:32,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:28:32,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827728778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:28:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 08:28:32,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398073781] [2023-08-27 08:28:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:32,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:32,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:32,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:28:32,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 473 [2023-08-27 08:28:32,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 489 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 08:28:32,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:32,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 473 [2023-08-27 08:28:32,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:32,272 INFO L124 PetriNetUnfolderBase]: 1959/2612 cut-off events. [2023-08-27 08:28:32,272 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2023-08-27 08:28:32,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6443 conditions, 2612 events. 1959/2612 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 11175 event pairs, 1060 based on Foata normal form. 0/1040 useless extension candidates. Maximal degree in co-relation 6322. Up to 2594 conditions per place. [2023-08-27 08:28:32,279 INFO L140 encePairwiseOnDemand]: 469/473 looper letters, 72 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-27 08:28:32,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 623 flow [2023-08-27 08:28:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-27 08:28:32,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2023-08-27 08:28:32,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-27 08:28:32,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-27 08:28:32,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:32,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-27 08:28:32,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 08:28:32,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:32,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:32,284 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 489 flow. Second operand 3 states and 627 transitions. [2023-08-27 08:28:32,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 623 flow [2023-08-27 08:28:32,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 499 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-27 08:28:32,287 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 355 flow [2023-08-27 08:28:32,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=355, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-08-27 08:28:32,287 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2023-08-27 08:28:32,287 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 355 flow [2023-08-27 08:28:32,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 08:28:32,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:32,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:32,294 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 08:28:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:32,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:32,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1907147589, now seen corresponding path program 1 times [2023-08-27 08:28:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:32,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604204268] [2023-08-27 08:28:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:32,530 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 08:28:32,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:32,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604204268] [2023-08-27 08:28:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604204268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:32,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:28:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165081075] [2023-08-27 08:28:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:32,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:28:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-27 08:28:32,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:28:32,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:32,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-27 08:28:32,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:32,749 INFO L124 PetriNetUnfolderBase]: 2126/2894 cut-off events. [2023-08-27 08:28:32,749 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2023-08-27 08:28:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6772 conditions, 2894 events. 2126/2894 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 13197 event pairs, 572 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 6752. Up to 2446 conditions per place. [2023-08-27 08:28:32,758 INFO L140 encePairwiseOnDemand]: 468/473 looper letters, 89 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2023-08-27 08:28:32,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 583 flow [2023-08-27 08:28:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-27 08:28:32,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2023-08-27 08:28:32,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-27 08:28:32,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-27 08:28:32,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:32,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-27 08:28:32,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 08:28:32,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:32,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:32,763 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 355 flow. Second operand 3 states and 636 transitions. [2023-08-27 08:28:32,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 583 flow [2023-08-27 08:28:32,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:32,765 INFO L231 Difference]: Finished difference. Result has 63 places, 78 transitions, 379 flow [2023-08-27 08:28:32,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=379, PETRI_PLACES=63, PETRI_TRANSITIONS=78} [2023-08-27 08:28:32,766 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-08-27 08:28:32,766 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 78 transitions, 379 flow [2023-08-27 08:28:32,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:28:32,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:32,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:32,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:28:32,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:32,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1007969399, now seen corresponding path program 1 times [2023-08-27 08:28:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831083751] [2023-08-27 08:28:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:32,815 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 08:28:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:32,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831083751] [2023-08-27 08:28:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831083751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:32,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238536256] [2023-08-27 08:28:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:32,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:32,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:32,817 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 08:28:32,819 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 08:28:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:32,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:28:32,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:32,899 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 08:28:32,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:32,909 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 08:28:32,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238536256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:32,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:32,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 08:28:32,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636333797] [2023-08-27 08:28:32,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:32,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:28:32,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:32,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:28:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:28:32,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-27 08:28:32,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 78 transitions, 379 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states 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 08:28:32,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:32,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-27 08:28:32,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:33,332 INFO L124 PetriNetUnfolderBase]: 3614/4682 cut-off events. [2023-08-27 08:28:33,332 INFO L125 PetriNetUnfolderBase]: For 1019/1019 co-relation queries the response was YES. [2023-08-27 08:28:33,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13157 conditions, 4682 events. 3614/4682 cut-off events. For 1019/1019 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 20953 event pairs, 443 based on Foata normal form. 0/1996 useless extension candidates. Maximal degree in co-relation 13136. Up to 2353 conditions per place. [2023-08-27 08:28:33,352 INFO L140 encePairwiseOnDemand]: 468/473 looper letters, 152 selfloop transitions, 13 changer transitions 0/167 dead transitions. [2023-08-27 08:28:33,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 943 flow [2023-08-27 08:28:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:28:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:28:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1486 transitions. [2023-08-27 08:28:33,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44880700694654185 [2023-08-27 08:28:33,356 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1486 transitions. [2023-08-27 08:28:33,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1486 transitions. [2023-08-27 08:28:33,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:33,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1486 transitions. [2023-08-27 08:28:33,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.28571428571428) internal successors, (1486), 7 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states 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 08:28:33,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:28:33,362 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:28:33,362 INFO L175 Difference]: Start difference. First operand has 63 places, 78 transitions, 379 flow. Second operand 7 states and 1486 transitions. [2023-08-27 08:28:33,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 943 flow [2023-08-27 08:28:33,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 167 transitions, 938 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:33,365 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 476 flow [2023-08-27 08:28:33,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-27 08:28:33,366 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2023-08-27 08:28:33,366 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 476 flow [2023-08-27 08:28:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states 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 08:28:33,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:33,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:33,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 08:28:33,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:33,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:33,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1007969375, now seen corresponding path program 1 times [2023-08-27 08:28:33,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:33,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064110049] [2023-08-27 08:28:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:28:33,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:33,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064110049] [2023-08-27 08:28:33,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064110049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:33,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:33,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:28:33,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175658815] [2023-08-27 08:28:33,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:33,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:33,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:28:33,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-27 08:28:33,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 08:28:33,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:33,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-27 08:28:33,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:33,903 INFO L124 PetriNetUnfolderBase]: 3047/4015 cut-off events. [2023-08-27 08:28:33,904 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2023-08-27 08:28:33,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12731 conditions, 4015 events. 3047/4015 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 18648 event pairs, 475 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 12707. Up to 2518 conditions per place. [2023-08-27 08:28:33,918 INFO L140 encePairwiseOnDemand]: 470/473 looper letters, 91 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-08-27 08:28:33,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 671 flow [2023-08-27 08:28:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-27 08:28:33,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44538407329105 [2023-08-27 08:28:33,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-27 08:28:33,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-27 08:28:33,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:33,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-27 08:28:33,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 08:28:33,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:33,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:33,937 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 476 flow. Second operand 3 states and 632 transitions. [2023-08-27 08:28:33,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 671 flow [2023-08-27 08:28:33,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 650 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:33,947 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 432 flow [2023-08-27 08:28:33,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-27 08:28:33,948 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 18 predicate places. [2023-08-27 08:28:33,948 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 432 flow [2023-08-27 08:28:33,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 08:28:33,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:33,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 08:28:33,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:33,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1008651134, now seen corresponding path program 1 times [2023-08-27 08:28:33,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:33,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982471312] [2023-08-27 08:28:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:34,026 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 08:28:34,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:34,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982471312] [2023-08-27 08:28:34,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982471312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:34,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:34,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:28:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312092413] [2023-08-27 08:28:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:28:34,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 473 [2023-08-27 08:28:34,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 08:28:34,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:34,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 473 [2023-08-27 08:28:34,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:34,344 INFO L124 PetriNetUnfolderBase]: 2658/3492 cut-off events. [2023-08-27 08:28:34,344 INFO L125 PetriNetUnfolderBase]: For 6977/7265 co-relation queries the response was YES. [2023-08-27 08:28:34,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10889 conditions, 3492 events. 2658/3492 cut-off events. For 6977/7265 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 13408 event pairs, 294 based on Foata normal form. 329/2467 useless extension candidates. Maximal degree in co-relation 10864. Up to 3107 conditions per place. [2023-08-27 08:28:34,356 INFO L140 encePairwiseOnDemand]: 463/473 looper letters, 97 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-08-27 08:28:34,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 105 transitions, 751 flow [2023-08-27 08:28:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-27 08:28:34,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2023-08-27 08:28:34,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-27 08:28:34,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-27 08:28:34,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:34,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-27 08:28:34,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 08:28:34,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:34,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:34,362 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 432 flow. Second operand 3 states and 639 transitions. [2023-08-27 08:28:34,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 105 transitions, 751 flow [2023-08-27 08:28:34,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 729 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:28:34,370 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 461 flow [2023-08-27 08:28:34,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-27 08:28:34,370 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2023-08-27 08:28:34,370 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 461 flow [2023-08-27 08:28:34,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 08:28:34,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:34,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:34,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 08:28:34,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:34,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1800454014, now seen corresponding path program 1 times [2023-08-27 08:28:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040815344] [2023-08-27 08:28:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:34,416 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 08:28:34,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:34,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040815344] [2023-08-27 08:28:34,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040815344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:34,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:34,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 08:28:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127054377] [2023-08-27 08:28:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:28:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:28:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:28:34,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 473 [2023-08-27 08:28:34,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 08:28:34,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:34,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 473 [2023-08-27 08:28:34,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:34,723 INFO L124 PetriNetUnfolderBase]: 2783/3712 cut-off events. [2023-08-27 08:28:34,723 INFO L125 PetriNetUnfolderBase]: For 5474/5686 co-relation queries the response was YES. [2023-08-27 08:28:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12853 conditions, 3712 events. 2783/3712 cut-off events. For 5474/5686 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 14502 event pairs, 1283 based on Foata normal form. 272/2664 useless extension candidates. Maximal degree in co-relation 12826. Up to 3467 conditions per place. [2023-08-27 08:28:34,736 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 84 selfloop transitions, 13 changer transitions 7/107 dead transitions. [2023-08-27 08:28:34,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 772 flow [2023-08-27 08:28:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:28:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:28:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-08-27 08:28:34,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3927061310782241 [2023-08-27 08:28:34,738 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-08-27 08:28:34,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-08-27 08:28:34,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:34,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-08-27 08:28:34,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 08:28:34,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:28:34,742 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:28:34,742 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 461 flow. Second operand 4 states and 743 transitions. [2023-08-27 08:28:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 772 flow [2023-08-27 08:28:34,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 767 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:34,749 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 493 flow [2023-08-27 08:28:34,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=493, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2023-08-27 08:28:34,750 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2023-08-27 08:28:34,750 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 493 flow [2023-08-27 08:28:34,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 08:28:34,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:34,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:34,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 08:28:34,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:34,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1482102202, now seen corresponding path program 1 times [2023-08-27 08:28:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:34,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028663730] [2023-08-27 08:28:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:34,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:34,805 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 08:28:34,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028663730] [2023-08-27 08:28:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028663730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:34,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146581924] [2023-08-27 08:28:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:34,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:34,807 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 08:28:34,833 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 08:28:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:34,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:28:34,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:34,926 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 08:28:34,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:28:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146581924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:34,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:28:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 08:28:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044322458] [2023-08-27 08:28:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:28:34,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 473 [2023-08-27 08:28:34,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 493 flow. Second operand has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 08:28:34,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:34,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 473 [2023-08-27 08:28:34,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:35,172 INFO L124 PetriNetUnfolderBase]: 2015/2722 cut-off events. [2023-08-27 08:28:35,172 INFO L125 PetriNetUnfolderBase]: For 4062/4218 co-relation queries the response was YES. [2023-08-27 08:28:35,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 2722 events. 2015/2722 cut-off events. For 4062/4218 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 10314 event pairs, 881 based on Foata normal form. 280/2048 useless extension candidates. Maximal degree in co-relation 9575. Up to 2696 conditions per place. [2023-08-27 08:28:35,182 INFO L140 encePairwiseOnDemand]: 470/473 looper letters, 81 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-08-27 08:28:35,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 649 flow [2023-08-27 08:28:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-27 08:28:35,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390415785764623 [2023-08-27 08:28:35,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-27 08:28:35,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-27 08:28:35,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:35,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-27 08:28:35,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:28:35,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:35,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:35,187 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 493 flow. Second operand 3 states and 623 transitions. [2023-08-27 08:28:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 649 flow [2023-08-27 08:28:35,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 621 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 08:28:35,192 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 459 flow [2023-08-27 08:28:35,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=459, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2023-08-27 08:28:35,193 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2023-08-27 08:28:35,193 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 459 flow [2023-08-27 08:28:35,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 08:28:35,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:35,193 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:35,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 08:28:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:35,398 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:35,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1992471621, now seen corresponding path program 2 times [2023-08-27 08:28:35,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:35,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900250672] [2023-08-27 08:28:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:35,481 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 08:28:35,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:35,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900250672] [2023-08-27 08:28:35,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900250672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:35,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36640716] [2023-08-27 08:28:35,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:28:35,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:35,503 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 08:28:35,504 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 08:28:35,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:28:35,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:28:35,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:28:35,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:35,600 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 08:28:35,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:28:35,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36640716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:35,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:28:35,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-27 08:28:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760645530] [2023-08-27 08:28:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:28:35,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 473 [2023-08-27 08:28:35,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 459 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:28:35,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:35,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 473 [2023-08-27 08:28:35,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:35,844 INFO L124 PetriNetUnfolderBase]: 1800/2427 cut-off events. [2023-08-27 08:28:35,844 INFO L125 PetriNetUnfolderBase]: For 3941/4097 co-relation queries the response was YES. [2023-08-27 08:28:35,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8408 conditions, 2427 events. 1800/2427 cut-off events. For 3941/4097 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9064 event pairs, 754 based on Foata normal form. 236/1816 useless extension candidates. Maximal degree in co-relation 8380. Up to 2401 conditions per place. [2023-08-27 08:28:35,853 INFO L140 encePairwiseOnDemand]: 471/473 looper letters, 79 selfloop transitions, 1 changer transitions 1/84 dead transitions. [2023-08-27 08:28:35,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 609 flow [2023-08-27 08:28:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-27 08:28:35,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2023-08-27 08:28:35,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-27 08:28:35,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-27 08:28:35,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:35,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-27 08:28:35,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 08:28:35,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:35,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:35,858 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 459 flow. Second operand 3 states and 612 transitions. [2023-08-27 08:28:35,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 609 flow [2023-08-27 08:28:35,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 592 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 08:28:35,864 INFO L231 Difference]: Finished difference. Result has 68 places, 83 transitions, 425 flow [2023-08-27 08:28:35,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=68, PETRI_TRANSITIONS=83} [2023-08-27 08:28:35,864 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2023-08-27 08:28:35,864 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 83 transitions, 425 flow [2023-08-27 08:28:35,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:28:35,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:35,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:35,875 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 08:28:36,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:36,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:36,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1482102388, now seen corresponding path program 1 times [2023-08-27 08:28:36,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:36,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988684165] [2023-08-27 08:28:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:36,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:36,131 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 08:28:36,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988684165] [2023-08-27 08:28:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988684165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:36,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:28:36,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:28:36,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586338084] [2023-08-27 08:28:36,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:36,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:28:36,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:28:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:28:36,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 473 [2023-08-27 08:28:36,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 425 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:28:36,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:36,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 473 [2023-08-27 08:28:36,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:36,282 INFO L124 PetriNetUnfolderBase]: 1423/1894 cut-off events. [2023-08-27 08:28:36,282 INFO L125 PetriNetUnfolderBase]: For 1109/1113 co-relation queries the response was YES. [2023-08-27 08:28:36,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 1894 events. 1423/1894 cut-off events. For 1109/1113 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 6439 event pairs, 300 based on Foata normal form. 7/1176 useless extension candidates. Maximal degree in co-relation 5944. Up to 1810 conditions per place. [2023-08-27 08:28:36,288 INFO L140 encePairwiseOnDemand]: 469/473 looper letters, 82 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-27 08:28:36,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 88 transitions, 607 flow [2023-08-27 08:28:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-27 08:28:36,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2023-08-27 08:28:36,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-27 08:28:36,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-27 08:28:36,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:36,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-27 08:28:36,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 08:28:36,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:36,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:36,292 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 425 flow. Second operand 3 states and 616 transitions. [2023-08-27 08:28:36,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 88 transitions, 607 flow [2023-08-27 08:28:36,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 598 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 08:28:36,296 INFO L231 Difference]: Finished difference. Result has 68 places, 83 transitions, 427 flow [2023-08-27 08:28:36,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=83} [2023-08-27 08:28:36,296 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2023-08-27 08:28:36,296 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 83 transitions, 427 flow [2023-08-27 08:28:36,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:28:36,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:36,296 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 08:28:36,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-27 08:28:36,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:36,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1705091769, now seen corresponding path program 2 times [2023-08-27 08:28:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:36,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580648091] [2023-08-27 08:28:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:28:36,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:36,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580648091] [2023-08-27 08:28:36,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580648091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:36,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139758720] [2023-08-27 08:28:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:28:36,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:36,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:36,415 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 08:28:36,417 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 08:28:36,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:28:36,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:28:36,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:28:36,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-27 08:28:36,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:28:36,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139758720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:36,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:28:36,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 08:28:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018770706] [2023-08-27 08:28:36,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:36,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:28:36,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:28:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:28:36,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 473 [2023-08-27 08:28:36,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 427 flow. Second operand has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states 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 08:28:36,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:36,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 473 [2023-08-27 08:28:36,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:36,686 INFO L124 PetriNetUnfolderBase]: 1423/1898 cut-off events. [2023-08-27 08:28:36,686 INFO L125 PetriNetUnfolderBase]: For 1309/1313 co-relation queries the response was YES. [2023-08-27 08:28:36,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5980 conditions, 1898 events. 1423/1898 cut-off events. For 1309/1313 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 6477 event pairs, 515 based on Foata normal form. 6/1177 useless extension candidates. Maximal degree in co-relation 5954. Up to 1886 conditions per place. [2023-08-27 08:28:36,692 INFO L140 encePairwiseOnDemand]: 471/473 looper letters, 77 selfloop transitions, 1 changer transitions 1/82 dead transitions. [2023-08-27 08:28:36,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 563 flow [2023-08-27 08:28:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:28:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:28:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-27 08:28:36,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073291050035236 [2023-08-27 08:28:36,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-27 08:28:36,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-27 08:28:36,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:36,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-27 08:28:36,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 08:28:36,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:36,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 08:28:36,696 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 427 flow. Second operand 3 states and 578 transitions. [2023-08-27 08:28:36,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 563 flow [2023-08-27 08:28:36,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 484 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-08-27 08:28:36,700 INFO L231 Difference]: Finished difference. Result has 57 places, 81 transitions, 322 flow [2023-08-27 08:28:36,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=57, PETRI_TRANSITIONS=81} [2023-08-27 08:28:36,700 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2023-08-27 08:28:36,700 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 81 transitions, 322 flow [2023-08-27 08:28:36,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states 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 08:28:36,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:36,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:36,705 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 08:28:36,904 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,SelfDestructingSolverStorable15 [2023-08-27 08:28:36,905 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:36,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash -868514367, now seen corresponding path program 1 times [2023-08-27 08:28:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:36,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921803793] [2023-08-27 08:28:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:36,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:37,283 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 08:28:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921803793] [2023-08-27 08:28:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921803793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049006013] [2023-08-27 08:28:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:37,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:37,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:37,284 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 08:28:37,286 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 08:28:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:37,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 08:28:37,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:37,446 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 08:28:37,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:37,487 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 08:28:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:37,535 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 08:28:37,570 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 08:28:37,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:37,708 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:37,708 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 31 treesize of output 32 [2023-08-27 08:28:37,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:37,716 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 87 treesize of output 79 [2023-08-27 08:28:37,719 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 08:28:37,724 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 08:28:37,837 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 08:28:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049006013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:37,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-27 08:28:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509220572] [2023-08-27 08:28:37,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:28:37,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:28:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=261, Unknown=1, NotChecked=0, Total=306 [2023-08-27 08:28:37,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 473 [2023-08-27 08:28:37,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 81 transitions, 322 flow. Second operand has 18 states, 18 states have (on average 134.0) internal successors, (2412), 18 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states 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 08:28:37,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:37,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 473 [2023-08-27 08:28:37,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:39,252 INFO L124 PetriNetUnfolderBase]: 2232/3128 cut-off events. [2023-08-27 08:28:39,252 INFO L125 PetriNetUnfolderBase]: For 2058/2087 co-relation queries the response was YES. [2023-08-27 08:28:39,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9599 conditions, 3128 events. 2232/3128 cut-off events. For 2058/2087 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 13100 event pairs, 363 based on Foata normal form. 29/2100 useless extension candidates. Maximal degree in co-relation 9583. Up to 1596 conditions per place. [2023-08-27 08:28:39,260 INFO L140 encePairwiseOnDemand]: 460/473 looper letters, 183 selfloop transitions, 49 changer transitions 0/234 dead transitions. [2023-08-27 08:28:39,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 234 transitions, 1374 flow [2023-08-27 08:28:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:28:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:28:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3461 transitions. [2023-08-27 08:28:39,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2926849894291755 [2023-08-27 08:28:39,267 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3461 transitions. [2023-08-27 08:28:39,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3461 transitions. [2023-08-27 08:28:39,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:39,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3461 transitions. [2023-08-27 08:28:39,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 138.44) internal successors, (3461), 25 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states 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 08:28:39,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 473.0) internal successors, (12298), 26 states have internal predecessors, (12298), 0 states have call successors, (0), 0 states 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 08:28:39,281 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 473.0) internal successors, (12298), 26 states have internal predecessors, (12298), 0 states have call successors, (0), 0 states 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 08:28:39,282 INFO L175 Difference]: Start difference. First operand has 57 places, 81 transitions, 322 flow. Second operand 25 states and 3461 transitions. [2023-08-27 08:28:39,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 234 transitions, 1374 flow [2023-08-27 08:28:39,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 234 transitions, 1341 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-27 08:28:39,286 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 620 flow [2023-08-27 08:28:39,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=620, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2023-08-27 08:28:39,287 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 41 predicate places. [2023-08-27 08:28:39,287 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 620 flow [2023-08-27 08:28:39,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 134.0) internal successors, (2412), 18 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states 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 08:28:39,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:39,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:39,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 08:28:39,498 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,SelfDestructingSolverStorable16 [2023-08-27 08:28:39,499 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:39,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:39,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1633328048, now seen corresponding path program 1 times [2023-08-27 08:28:39,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:39,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573314293] [2023-08-27 08:28:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:39,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:39,758 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 08:28:39,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:39,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573314293] [2023-08-27 08:28:39,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573314293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:39,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198113230] [2023-08-27 08:28:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:39,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:39,780 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 08:28:39,807 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 08:28:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:39,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:28:39,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:39,922 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 08:28:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:39,972 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 08:28:40,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:40,004 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 08:28:40,061 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 08:28:40,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:40,106 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2_back~0 Int) (v_ArrVal_646 (Array Int Int))) (or (<= 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_646) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648)) (< ~q2_back~0 0) (<= c_~n2~0 ~q2_back~0))) is different from false [2023-08-27 08:28:40,161 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:40,162 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 08:28:40,169 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:40,169 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 183 treesize of output 167 [2023-08-27 08:28:40,174 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 33 treesize of output 27 [2023-08-27 08:28:40,179 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 38 treesize of output 26 [2023-08-27 08:28:40,287 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 08:28:40,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198113230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:40,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 08:28:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633809680] [2023-08-27 08:28:40,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:40,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:28:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:28:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=204, Unknown=1, NotChecked=28, Total=272 [2023-08-27 08:28:40,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 473 [2023-08-27 08:28:40,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 620 flow. Second operand has 17 states, 17 states have (on average 134.11764705882354) internal successors, (2280), 17 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states 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 08:28:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:40,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 473 [2023-08-27 08:28:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:41,934 INFO L124 PetriNetUnfolderBase]: 3831/5306 cut-off events. [2023-08-27 08:28:41,934 INFO L125 PetriNetUnfolderBase]: For 8121/8158 co-relation queries the response was YES. [2023-08-27 08:28:41,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17987 conditions, 5306 events. 3831/5306 cut-off events. For 8121/8158 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 23929 event pairs, 595 based on Foata normal form. 138/3836 useless extension candidates. Maximal degree in co-relation 17956. Up to 2826 conditions per place. [2023-08-27 08:28:41,954 INFO L140 encePairwiseOnDemand]: 459/473 looper letters, 243 selfloop transitions, 74 changer transitions 0/319 dead transitions. [2023-08-27 08:28:41,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 319 transitions, 2308 flow [2023-08-27 08:28:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 08:28:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 08:28:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3741 transitions. [2023-08-27 08:28:41,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29292929292929293 [2023-08-27 08:28:41,960 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3741 transitions. [2023-08-27 08:28:41,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3741 transitions. [2023-08-27 08:28:41,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:41,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3741 transitions. [2023-08-27 08:28:41,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states 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 08:28:41,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 473.0) internal successors, (13244), 28 states have internal predecessors, (13244), 0 states have call successors, (0), 0 states 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 08:28:41,973 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 473.0) internal successors, (13244), 28 states have internal predecessors, (13244), 0 states have call successors, (0), 0 states 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 08:28:41,973 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 620 flow. Second operand 27 states and 3741 transitions. [2023-08-27 08:28:41,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 319 transitions, 2308 flow [2023-08-27 08:28:41,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 319 transitions, 2259 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-27 08:28:41,990 INFO L231 Difference]: Finished difference. Result has 126 places, 147 transitions, 1060 flow [2023-08-27 08:28:41,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1060, PETRI_PLACES=126, PETRI_TRANSITIONS=147} [2023-08-27 08:28:41,990 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 74 predicate places. [2023-08-27 08:28:41,990 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 147 transitions, 1060 flow [2023-08-27 08:28:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 134.11764705882354) internal successors, (2280), 17 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states 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 08:28:41,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:41,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:41,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-27 08:28:42,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 08:28:42,196 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:42,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1138680764, now seen corresponding path program 2 times [2023-08-27 08:28:42,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:42,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49864385] [2023-08-27 08:28:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:42,550 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 08:28:42,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:42,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49864385] [2023-08-27 08:28:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49864385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:42,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795640679] [2023-08-27 08:28:42,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:28:42,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:42,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:42,565 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 08:28:42,596 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 08:28:42,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:28:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:28:42,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 08:28:42,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:42,787 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 08:28:42,831 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 08:28:42,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:28:42,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795640679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:28:42,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:28:42,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 08:28:42,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567418767] [2023-08-27 08:28:42,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:28:42,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:28:42,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:28:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:28:42,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 473 [2023-08-27 08:28:42,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 1060 flow. Second operand has 7 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:28:42,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:42,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 473 [2023-08-27 08:28:42,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:43,517 INFO L124 PetriNetUnfolderBase]: 4336/5993 cut-off events. [2023-08-27 08:28:43,517 INFO L125 PetriNetUnfolderBase]: For 19984/20021 co-relation queries the response was YES. [2023-08-27 08:28:43,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22829 conditions, 5993 events. 4336/5993 cut-off events. For 19984/20021 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 27751 event pairs, 1001 based on Foata normal form. 100/4565 useless extension candidates. Maximal degree in co-relation 22787. Up to 4224 conditions per place. [2023-08-27 08:28:43,550 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 168 selfloop transitions, 38 changer transitions 0/208 dead transitions. [2023-08-27 08:28:43,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 1857 flow [2023-08-27 08:28:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:28:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:28:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1054 transitions. [2023-08-27 08:28:43,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3713883016208598 [2023-08-27 08:28:43,551 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1054 transitions. [2023-08-27 08:28:43,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1054 transitions. [2023-08-27 08:28:43,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:43,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1054 transitions. [2023-08-27 08:28:43,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.66666666666666) internal successors, (1054), 6 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 08:28:43,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:28:43,554 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:28:43,554 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 1060 flow. Second operand 6 states and 1054 transitions. [2023-08-27 08:28:43,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 1857 flow [2023-08-27 08:28:43,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 208 transitions, 1714 flow, removed 46 selfloop flow, removed 13 redundant places. [2023-08-27 08:28:43,588 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1120 flow [2023-08-27 08:28:43,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1120, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2023-08-27 08:28:43,588 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 68 predicate places. [2023-08-27 08:28:43,588 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1120 flow [2023-08-27 08:28:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:28:43,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:43,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:43,599 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 08:28:43,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:43,794 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:43,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:43,795 INFO L85 PathProgramCache]: Analyzing trace with hash 352404430, now seen corresponding path program 1 times [2023-08-27 08:28:43,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:43,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978476734] [2023-08-27 08:28:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:43,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:44,215 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 08:28:44,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978476734] [2023-08-27 08:28:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978476734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730933413] [2023-08-27 08:28:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:44,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:44,229 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 08:28:44,308 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 08:28:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:44,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:28:44,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:44,449 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 08:28:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:44,495 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 08:28:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:44,538 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 08:28:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:44,613 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 08:28:44,634 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 08:28:44,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:46,821 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:46,821 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 08:28:46,831 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:46,831 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 715 treesize of output 683 [2023-08-27 08:28:46,841 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 77 treesize of output 71 [2023-08-27 08:28:46,845 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 154 treesize of output 130 [2023-08-27 08:28:46,851 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 58 [2023-08-27 08:28:47,024 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 08:28:47,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730933413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:47,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2023-08-27 08:28:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729288182] [2023-08-27 08:28:47,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:47,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:28:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:28:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=351, Unknown=6, NotChecked=0, Total=420 [2023-08-27 08:28:47,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 473 [2023-08-27 08:28:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1120 flow. Second operand has 21 states, 21 states have (on average 138.85714285714286) internal successors, (2916), 21 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 08:28:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 473 [2023-08-27 08:28:47,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:48,348 INFO L124 PetriNetUnfolderBase]: 6310/8868 cut-off events. [2023-08-27 08:28:48,348 INFO L125 PetriNetUnfolderBase]: For 31914/31975 co-relation queries the response was YES. [2023-08-27 08:28:48,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33877 conditions, 8868 events. 6310/8868 cut-off events. For 31914/31975 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 45401 event pairs, 1606 based on Foata normal form. 96/6753 useless extension candidates. Maximal degree in co-relation 33834. Up to 3775 conditions per place. [2023-08-27 08:28:48,396 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 219 selfloop transitions, 48 changer transitions 0/269 dead transitions. [2023-08-27 08:28:48,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 269 transitions, 2456 flow [2023-08-27 08:28:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 08:28:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 08:28:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1481 transitions. [2023-08-27 08:28:48,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.313107822410148 [2023-08-27 08:28:48,398 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1481 transitions. [2023-08-27 08:28:48,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1481 transitions. [2023-08-27 08:28:48,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:48,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1481 transitions. [2023-08-27 08:28:48,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 148.1) internal successors, (1481), 10 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states 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 08:28:48,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states 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 08:28:48,402 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states 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 08:28:48,402 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1120 flow. Second operand 10 states and 1481 transitions. [2023-08-27 08:28:48,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 269 transitions, 2456 flow [2023-08-27 08:28:48,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 269 transitions, 2282 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-08-27 08:28:48,467 INFO L231 Difference]: Finished difference. Result has 127 places, 158 transitions, 1204 flow [2023-08-27 08:28:48,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1204, PETRI_PLACES=127, PETRI_TRANSITIONS=158} [2023-08-27 08:28:48,468 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2023-08-27 08:28:48,468 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 158 transitions, 1204 flow [2023-08-27 08:28:48,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 138.85714285714286) internal successors, (2916), 21 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 08:28:48,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:48,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:48,475 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 08:28:48,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:48,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:48,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:48,674 INFO L85 PathProgramCache]: Analyzing trace with hash -301878329, now seen corresponding path program 1 times [2023-08-27 08:28:48,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:48,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459480074] [2023-08-27 08:28:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:48,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:49,008 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 08:28:49,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:49,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459480074] [2023-08-27 08:28:49,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459480074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:49,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142864327] [2023-08-27 08:28:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:49,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:49,013 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 08:28:49,052 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 08:28:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:49,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 08:28:49,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:49,324 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 08:28:49,365 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 08:28:49,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:49,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:49,446 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 08:28:49,448 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 08:28:49,607 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 08:28:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142864327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:49,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:49,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 08:28:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218057789] [2023-08-27 08:28:49,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:28:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:28:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=316, Unknown=3, NotChecked=0, Total=380 [2023-08-27 08:28:49,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 473 [2023-08-27 08:28:49,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 158 transitions, 1204 flow. Second operand has 20 states, 20 states have (on average 143.95) internal successors, (2879), 20 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states 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 08:28:49,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:49,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 473 [2023-08-27 08:28:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:50,248 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_809 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_809) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) (<= (+ c_~s~0 |c_thread2Thread1of1ForFork0_~j~0#1|) 2147483647)) is different from false [2023-08-27 08:28:50,494 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_809 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_809) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) (= |c_thread2Thread1of1ForFork0_~j~0#1| 0) (= c_~s~0 0)) is different from false [2023-08-27 08:28:50,886 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_809 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_809) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) (<= c_~s~0 0) (<= |c_thread2Thread1of1ForFork0_~j~0#1| 0)) is different from false [2023-08-27 08:28:52,390 INFO L124 PetriNetUnfolderBase]: 11958/17415 cut-off events. [2023-08-27 08:28:52,391 INFO L125 PetriNetUnfolderBase]: For 44419/44507 co-relation queries the response was YES. [2023-08-27 08:28:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62626 conditions, 17415 events. 11958/17415 cut-off events. For 44419/44507 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110253 event pairs, 1089 based on Foata normal form. 311/13034 useless extension candidates. Maximal degree in co-relation 62582. Up to 7314 conditions per place. [2023-08-27 08:28:52,480 INFO L140 encePairwiseOnDemand]: 452/473 looper letters, 393 selfloop transitions, 178 changer transitions 9/582 dead transitions. [2023-08-27 08:28:52,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 582 transitions, 5133 flow [2023-08-27 08:28:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:28:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:28:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3703 transitions. [2023-08-27 08:28:52,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261980267794221 [2023-08-27 08:28:52,483 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3703 transitions. [2023-08-27 08:28:52,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3703 transitions. [2023-08-27 08:28:52,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:28:52,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3703 transitions. [2023-08-27 08:28:52,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 154.29166666666666) internal successors, (3703), 24 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states 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 08:28:52,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states 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 08:28:52,493 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 473.0) internal successors, (11825), 25 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states 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 08:28:52,493 INFO L175 Difference]: Start difference. First operand has 127 places, 158 transitions, 1204 flow. Second operand 24 states and 3703 transitions. [2023-08-27 08:28:52,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 582 transitions, 5133 flow [2023-08-27 08:28:52,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 582 transitions, 4993 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 08:28:52,630 INFO L231 Difference]: Finished difference. Result has 155 places, 310 transitions, 3153 flow [2023-08-27 08:28:52,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3153, PETRI_PLACES=155, PETRI_TRANSITIONS=310} [2023-08-27 08:28:52,631 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2023-08-27 08:28:52,631 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 310 transitions, 3153 flow [2023-08-27 08:28:52,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 143.95) internal successors, (2879), 20 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states 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 08:28:52,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:28:52,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:28:52,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 08:28:52,837 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,SelfDestructingSolverStorable20 [2023-08-27 08:28:52,837 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:28:52,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:28:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1761350689, now seen corresponding path program 1 times [2023-08-27 08:28:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:28:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314474499] [2023-08-27 08:28:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:52,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:28:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:53,268 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 08:28:53,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:28:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314474499] [2023-08-27 08:28:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314474499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:28:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478219017] [2023-08-27 08:28:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:28:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:28:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:28:53,270 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 08:28:53,272 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 08:28:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:28:53,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 08:28:53,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:28:53,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:53,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:53,423 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 08:28:53,424 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 08:28:53,471 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 08:28:53,529 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:28:53,529 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 08:28:53,571 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 08:28:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:53,611 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 08:28:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:53,715 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 08:28:53,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:28:53,771 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 08:28:53,807 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:28:53,807 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 08:28:53,826 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 08:28:53,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:28:53,869 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_871 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_871) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 08:28:56,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:56,216 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 08:28:56,228 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:28:56,229 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 10817 treesize of output 10561 [2023-08-27 08:28:56,251 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 08:28:56,259 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 314 treesize of output 266 [2023-08-27 08:28:56,268 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 266 treesize of output 242 [2023-08-27 08:28:56,277 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 126 treesize of output 114 [2023-08-27 08:28:56,504 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 08:28:56,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478219017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:28:56,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:28:56,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 08:28:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282186626] [2023-08-27 08:28:56,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:28:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:28:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:28:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:28:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=560, Unknown=15, NotChecked=48, Total=702 [2023-08-27 08:28:56,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 473 [2023-08-27 08:28:56,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 310 transitions, 3153 flow. Second operand has 27 states, 27 states have (on average 126.44444444444444) internal successors, (3414), 27 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 08:28:56,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:28:56,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 473 [2023-08-27 08:28:56,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:28:58,962 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 08:29:00,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:29:08,303 INFO L124 PetriNetUnfolderBase]: 11475/16856 cut-off events. [2023-08-27 08:29:08,304 INFO L125 PetriNetUnfolderBase]: For 97515/97606 co-relation queries the response was YES. [2023-08-27 08:29:08,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92491 conditions, 16856 events. 11475/16856 cut-off events. For 97515/97606 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 105852 event pairs, 1820 based on Foata normal form. 378/13479 useless extension candidates. Maximal degree in co-relation 92435. Up to 10712 conditions per place. [2023-08-27 08:29:08,394 INFO L140 encePairwiseOnDemand]: 459/473 looper letters, 483 selfloop transitions, 253 changer transitions 0/738 dead transitions. [2023-08-27 08:29:08,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 738 transitions, 8350 flow [2023-08-27 08:29:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 08:29:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 08:29:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5015 transitions. [2023-08-27 08:29:08,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27901413152331145 [2023-08-27 08:29:08,399 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5015 transitions. [2023-08-27 08:29:08,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5015 transitions. [2023-08-27 08:29:08,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:08,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5015 transitions. [2023-08-27 08:29:08,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 131.97368421052633) internal successors, (5015), 38 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states 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 08:29:08,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 473.0) internal successors, (18447), 39 states have internal predecessors, (18447), 0 states have call successors, (0), 0 states 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 08:29:08,411 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 473.0) internal successors, (18447), 39 states have internal predecessors, (18447), 0 states have call successors, (0), 0 states 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 08:29:08,411 INFO L175 Difference]: Start difference. First operand has 155 places, 310 transitions, 3153 flow. Second operand 38 states and 5015 transitions. [2023-08-27 08:29:08,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 738 transitions, 8350 flow [2023-08-27 08:29:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 738 transitions, 7932 flow, removed 200 selfloop flow, removed 3 redundant places. [2023-08-27 08:29:08,884 INFO L231 Difference]: Finished difference. Result has 205 places, 445 transitions, 5408 flow [2023-08-27 08:29:08,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5408, PETRI_PLACES=205, PETRI_TRANSITIONS=445} [2023-08-27 08:29:08,885 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2023-08-27 08:29:08,885 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 445 transitions, 5408 flow [2023-08-27 08:29:08,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 126.44444444444444) internal successors, (3414), 27 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states 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 08:29:08,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:08,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:08,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-27 08:29:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:09,090 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:09,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1965024295, now seen corresponding path program 1 times [2023-08-27 08:29:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307199995] [2023-08-27 08:29:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:09,197 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 08:29:09,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307199995] [2023-08-27 08:29:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307199995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134460227] [2023-08-27 08:29:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:09,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:09,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:09,213 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 08:29:09,241 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 08:29:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:09,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:29:09,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:09,409 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 08:29:09,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:09,480 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 08:29:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134460227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:09,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 08:29:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678645716] [2023-08-27 08:29:09,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:29:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:29:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:29:09,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 473 [2023-08-27 08:29:09,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 445 transitions, 5408 flow. Second operand has 12 states, 12 states have (on average 173.08333333333334) internal successors, (2077), 12 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states 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 08:29:09,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:09,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 473 [2023-08-27 08:29:09,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:12,167 INFO L124 PetriNetUnfolderBase]: 11804/17128 cut-off events. [2023-08-27 08:29:12,167 INFO L125 PetriNetUnfolderBase]: For 156372/156472 co-relation queries the response was YES. [2023-08-27 08:29:12,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113090 conditions, 17128 events. 11804/17128 cut-off events. For 156372/156472 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 105952 event pairs, 3690 based on Foata normal form. 1087/14396 useless extension candidates. Maximal degree in co-relation 113017. Up to 12388 conditions per place. [2023-08-27 08:29:12,331 INFO L140 encePairwiseOnDemand]: 466/473 looper letters, 468 selfloop transitions, 55 changer transitions 0/526 dead transitions. [2023-08-27 08:29:12,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 526 transitions, 7192 flow [2023-08-27 08:29:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:29:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:29:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1090 transitions. [2023-08-27 08:29:12,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38407329105003524 [2023-08-27 08:29:12,333 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1090 transitions. [2023-08-27 08:29:12,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1090 transitions. [2023-08-27 08:29:12,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:12,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1090 transitions. [2023-08-27 08:29:12,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.66666666666666) internal successors, (1090), 6 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states 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 08:29:12,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:29:12,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:29:12,336 INFO L175 Difference]: Start difference. First operand has 205 places, 445 transitions, 5408 flow. Second operand 6 states and 1090 transitions. [2023-08-27 08:29:12,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 526 transitions, 7192 flow [2023-08-27 08:29:12,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 526 transitions, 6789 flow, removed 180 selfloop flow, removed 8 redundant places. [2023-08-27 08:29:12,816 INFO L231 Difference]: Finished difference. Result has 203 places, 441 transitions, 5140 flow [2023-08-27 08:29:12,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5140, PETRI_PLACES=203, PETRI_TRANSITIONS=441} [2023-08-27 08:29:12,825 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2023-08-27 08:29:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 441 transitions, 5140 flow [2023-08-27 08:29:12,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.08333333333334) internal successors, (2077), 12 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states 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 08:29:12,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:12,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:12,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 08:29:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:13,031 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:13,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1854943106, now seen corresponding path program 1 times [2023-08-27 08:29:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051435620] [2023-08-27 08:29:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:13,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:13,997 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 08:29:13,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:13,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051435620] [2023-08-27 08:29:13,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051435620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:13,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073532882] [2023-08-27 08:29:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:13,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:13,999 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 08:29:14,001 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 08:29:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:14,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:29:14,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:14,262 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 08:29:14,310 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 08:29:14,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:14,359 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_980 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_980) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 08:29:14,367 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:14,368 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 48 treesize of output 40 [2023-08-27 08:29:14,376 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 08:29:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:29:14,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073532882] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:14,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:29:14,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 20 [2023-08-27 08:29:14,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537521509] [2023-08-27 08:29:14,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:14,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:29:14,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:29:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=367, Unknown=1, NotChecked=38, Total=462 [2023-08-27 08:29:14,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 473 [2023-08-27 08:29:14,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 441 transitions, 5140 flow. Second operand has 7 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:29:14,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:14,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 473 [2023-08-27 08:29:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:17,605 INFO L124 PetriNetUnfolderBase]: 13272/19499 cut-off events. [2023-08-27 08:29:17,606 INFO L125 PetriNetUnfolderBase]: For 181356/181530 co-relation queries the response was YES. [2023-08-27 08:29:17,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127666 conditions, 19499 events. 13272/19499 cut-off events. For 181356/181530 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 124598 event pairs, 2127 based on Foata normal form. 180/15905 useless extension candidates. Maximal degree in co-relation 127592. Up to 12385 conditions per place. [2023-08-27 08:29:17,850 INFO L140 encePairwiseOnDemand]: 457/473 looper letters, 374 selfloop transitions, 193 changer transitions 0/569 dead transitions. [2023-08-27 08:29:17,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 569 transitions, 7700 flow [2023-08-27 08:29:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:29:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:29:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1225 transitions. [2023-08-27 08:29:17,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2023-08-27 08:29:17,852 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1225 transitions. [2023-08-27 08:29:17,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1225 transitions. [2023-08-27 08:29:17,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:17,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1225 transitions. [2023-08-27 08:29:17,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 08:29:17,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:29:17,855 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:29:17,855 INFO L175 Difference]: Start difference. First operand has 203 places, 441 transitions, 5140 flow. Second operand 7 states and 1225 transitions. [2023-08-27 08:29:17,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 569 transitions, 7700 flow [2023-08-27 08:29:18,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 569 transitions, 7602 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-27 08:29:18,474 INFO L231 Difference]: Finished difference. Result has 208 places, 500 transitions, 6610 flow [2023-08-27 08:29:18,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6610, PETRI_PLACES=208, PETRI_TRANSITIONS=500} [2023-08-27 08:29:18,475 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 156 predicate places. [2023-08-27 08:29:18,475 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 500 transitions, 6610 flow [2023-08-27 08:29:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:29:18,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:18,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:18,486 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 08:29:18,680 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,SelfDestructingSolverStorable23 [2023-08-27 08:29:18,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:18,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1237599751, now seen corresponding path program 1 times [2023-08-27 08:29:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:18,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174648999] [2023-08-27 08:29:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:20,097 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 08:29:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174648999] [2023-08-27 08:29:20,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174648999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140015733] [2023-08-27 08:29:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:20,099 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 08:29:20,100 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 08:29:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:20,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:29:20,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:20,407 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 08:29:20,457 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 08:29:20,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:20,501 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1041 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1041) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 08:29:20,509 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:20,509 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 08:29:20,520 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 08:29:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:29:20,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140015733] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:20,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:29:20,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 20 [2023-08-27 08:29:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259782851] [2023-08-27 08:29:20,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:20,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:29:20,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:29:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=367, Unknown=1, NotChecked=38, Total=462 [2023-08-27 08:29:20,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 473 [2023-08-27 08:29:20,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 500 transitions, 6610 flow. Second operand has 7 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:29:20,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:20,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 473 [2023-08-27 08:29:20,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:23,933 INFO L124 PetriNetUnfolderBase]: 13602/20038 cut-off events. [2023-08-27 08:29:23,933 INFO L125 PetriNetUnfolderBase]: For 211448/211622 co-relation queries the response was YES. [2023-08-27 08:29:24,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138849 conditions, 20038 events. 13602/20038 cut-off events. For 211448/211622 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 128493 event pairs, 2246 based on Foata normal form. 257/16554 useless extension candidates. Maximal degree in co-relation 138771. Up to 12560 conditions per place. [2023-08-27 08:29:24,078 INFO L140 encePairwiseOnDemand]: 458/473 looper letters, 363 selfloop transitions, 274 changer transitions 0/639 dead transitions. [2023-08-27 08:29:24,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 639 transitions, 9768 flow [2023-08-27 08:29:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:29:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:29:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1225 transitions. [2023-08-27 08:29:24,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2023-08-27 08:29:24,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1225 transitions. [2023-08-27 08:29:24,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1225 transitions. [2023-08-27 08:29:24,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:24,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1225 transitions. [2023-08-27 08:29:24,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 08:29:24,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:29:24,083 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:29:24,083 INFO L175 Difference]: Start difference. First operand has 208 places, 500 transitions, 6610 flow. Second operand 7 states and 1225 transitions. [2023-08-27 08:29:24,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 639 transitions, 9768 flow [2023-08-27 08:29:25,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 639 transitions, 9685 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-08-27 08:29:25,058 INFO L231 Difference]: Finished difference. Result has 217 places, 580 transitions, 8925 flow [2023-08-27 08:29:25,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=6533, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8925, PETRI_PLACES=217, PETRI_TRANSITIONS=580} [2023-08-27 08:29:25,058 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 165 predicate places. [2023-08-27 08:29:25,058 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 580 transitions, 8925 flow [2023-08-27 08:29:25,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 08:29:25,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:25,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:25,063 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 08:29:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:25,263 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:25,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 385480806, now seen corresponding path program 2 times [2023-08-27 08:29:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170512016] [2023-08-27 08:29:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:25,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170512016] [2023-08-27 08:29:25,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170512016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:25,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693154049] [2023-08-27 08:29:25,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:29:25,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:25,716 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 08:29:25,717 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 08:29:25,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:29:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:29:25,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:29:25,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:25,943 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 08:29:25,976 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 08:29:25,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:29:25,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693154049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:25,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:29:25,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 08:29:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470268878] [2023-08-27 08:29:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:25,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:29:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:29:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:29:25,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 473 [2023-08-27 08:29:25,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 580 transitions, 8925 flow. Second operand has 7 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 08:29:25,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:25,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 473 [2023-08-27 08:29:25,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:29,979 INFO L124 PetriNetUnfolderBase]: 15292/22467 cut-off events. [2023-08-27 08:29:29,980 INFO L125 PetriNetUnfolderBase]: For 289799/289973 co-relation queries the response was YES. [2023-08-27 08:29:30,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165522 conditions, 22467 events. 15292/22467 cut-off events. For 289799/289973 co-relation queries the response was YES. Maximal size of possible extension queue 1379. Compared 146218 event pairs, 3409 based on Foata normal form. 347/18674 useless extension candidates. Maximal degree in co-relation 165439. Up to 16697 conditions per place. [2023-08-27 08:29:30,200 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 555 selfloop transitions, 89 changer transitions 4/650 dead transitions. [2023-08-27 08:29:30,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 650 transitions, 11154 flow [2023-08-27 08:29:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:29:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:29:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1054 transitions. [2023-08-27 08:29:30,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3713883016208598 [2023-08-27 08:29:30,202 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1054 transitions. [2023-08-27 08:29:30,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1054 transitions. [2023-08-27 08:29:30,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:30,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1054 transitions. [2023-08-27 08:29:30,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.66666666666666) internal successors, (1054), 6 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 08:29:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:29:30,205 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:29:30,205 INFO L175 Difference]: Start difference. First operand has 217 places, 580 transitions, 8925 flow. Second operand 6 states and 1054 transitions. [2023-08-27 08:29:30,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 650 transitions, 11154 flow [2023-08-27 08:29:32,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 650 transitions, 11014 flow, removed 47 selfloop flow, removed 2 redundant places. [2023-08-27 08:29:32,249 INFO L231 Difference]: Finished difference. Result has 222 places, 581 transitions, 9065 flow [2023-08-27 08:29:32,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=8657, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9065, PETRI_PLACES=222, PETRI_TRANSITIONS=581} [2023-08-27 08:29:32,252 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 170 predicate places. [2023-08-27 08:29:32,252 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 581 transitions, 9065 flow [2023-08-27 08:29:32,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 08:29:32,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:32,252 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:32,260 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 08:29:32,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:32,457 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:32,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 33387128, now seen corresponding path program 3 times [2023-08-27 08:29:32,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:32,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146477314] [2023-08-27 08:29:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:32,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:32,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:32,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146477314] [2023-08-27 08:29:32,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146477314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:32,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232837777] [2023-08-27 08:29:32,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:29:32,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:32,549 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 08:29:32,555 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 08:29:32,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:29:32,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:29:32,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 08:29:32,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:32,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:32,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232837777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:32,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:32,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-27 08:29:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987792821] [2023-08-27 08:29:32,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:32,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:29:32,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:29:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:29:32,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 473 [2023-08-27 08:29:32,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 581 transitions, 9065 flow. Second operand has 16 states, 16 states have (on average 171.3125) internal successors, (2741), 16 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states 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 08:29:32,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:32,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 473 [2023-08-27 08:29:32,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:35,119 INFO L124 PetriNetUnfolderBase]: 8128/12078 cut-off events. [2023-08-27 08:29:35,120 INFO L125 PetriNetUnfolderBase]: For 176508/176745 co-relation queries the response was YES. [2023-08-27 08:29:35,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93485 conditions, 12078 events. 8128/12078 cut-off events. For 176508/176745 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 73066 event pairs, 2610 based on Foata normal form. 755/10648 useless extension candidates. Maximal degree in co-relation 93411. Up to 10032 conditions per place. [2023-08-27 08:29:35,358 INFO L140 encePairwiseOnDemand]: 467/473 looper letters, 390 selfloop transitions, 43 changer transitions 0/438 dead transitions. [2023-08-27 08:29:35,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 438 transitions, 7351 flow [2023-08-27 08:29:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:29:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:29:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1253 transitions. [2023-08-27 08:29:35,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2023-08-27 08:29:35,359 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1253 transitions. [2023-08-27 08:29:35,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1253 transitions. [2023-08-27 08:29:35,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:35,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1253 transitions. [2023-08-27 08:29:35,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 08:29:35,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:29:35,362 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 473.0) internal successors, (3784), 8 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states 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 08:29:35,362 INFO L175 Difference]: Start difference. First operand has 222 places, 581 transitions, 9065 flow. Second operand 7 states and 1253 transitions. [2023-08-27 08:29:35,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 438 transitions, 7351 flow [2023-08-27 08:29:36,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 438 transitions, 7024 flow, removed 76 selfloop flow, removed 13 redundant places. [2023-08-27 08:29:36,251 INFO L231 Difference]: Finished difference. Result has 207 places, 391 transitions, 5998 flow [2023-08-27 08:29:36,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=5881, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5998, PETRI_PLACES=207, PETRI_TRANSITIONS=391} [2023-08-27 08:29:36,252 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 155 predicate places. [2023-08-27 08:29:36,252 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 391 transitions, 5998 flow [2023-08-27 08:29:36,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 171.3125) internal successors, (2741), 16 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states 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 08:29:36,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:36,252 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:36,260 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 08:29:36,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:36,458 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:36,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1674996611, now seen corresponding path program 2 times [2023-08-27 08:29:36,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862572825] [2023-08-27 08:29:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:36,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:37,473 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 08:29:37,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:37,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862572825] [2023-08-27 08:29:37,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862572825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:37,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416123623] [2023-08-27 08:29:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:29:37,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:37,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:37,476 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 08:29:37,479 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 08:29:37,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:29:37,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:29:37,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 08:29:37,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:37,642 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 26 treesize of output 24 [2023-08-27 08:29:37,773 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 08:29:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:37,806 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 08:29:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:29:37,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:29:37,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416123623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:37,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:29:37,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 08:29:37,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029995341] [2023-08-27 08:29:37,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:37,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:29:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:29:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:29:37,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 473 [2023-08-27 08:29:37,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 391 transitions, 5998 flow. Second operand has 8 states, 8 states have (on average 163.625) internal successors, (1309), 8 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states 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 08:29:37,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:37,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 473 [2023-08-27 08:29:37,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:39,945 INFO L124 PetriNetUnfolderBase]: 8615/12857 cut-off events. [2023-08-27 08:29:39,946 INFO L125 PetriNetUnfolderBase]: For 143030/143204 co-relation queries the response was YES. [2023-08-27 08:29:39,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83918 conditions, 12857 events. 8615/12857 cut-off events. For 143030/143204 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 78649 event pairs, 2126 based on Foata normal form. 189/10754 useless extension candidates. Maximal degree in co-relation 83852. Up to 10287 conditions per place. [2023-08-27 08:29:40,038 INFO L140 encePairwiseOnDemand]: 467/473 looper letters, 373 selfloop transitions, 70 changer transitions 0/445 dead transitions. [2023-08-27 08:29:40,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 445 transitions, 7598 flow [2023-08-27 08:29:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:29:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:29:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-27 08:29:40,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36504580690627203 [2023-08-27 08:29:40,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-27 08:29:40,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-27 08:29:40,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:40,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-27 08:29:40,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 08:29:40,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:29:40,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:29:40,042 INFO L175 Difference]: Start difference. First operand has 207 places, 391 transitions, 5998 flow. Second operand 6 states and 1036 transitions. [2023-08-27 08:29:40,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 445 transitions, 7598 flow [2023-08-27 08:29:40,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 445 transitions, 7529 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-27 08:29:40,874 INFO L231 Difference]: Finished difference. Result has 209 places, 396 transitions, 6211 flow [2023-08-27 08:29:40,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6211, PETRI_PLACES=209, PETRI_TRANSITIONS=396} [2023-08-27 08:29:40,874 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2023-08-27 08:29:40,874 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 396 transitions, 6211 flow [2023-08-27 08:29:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.625) internal successors, (1309), 8 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states 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 08:29:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:40,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:40,881 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 08:29:41,080 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,SelfDestructingSolverStorable27 [2023-08-27 08:29:41,080 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:29:41,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1675101866, now seen corresponding path program 1 times [2023-08-27 08:29:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:41,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411864946] [2023-08-27 08:29:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:41,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:41,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411864946] [2023-08-27 08:29:41,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411864946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:41,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210882940] [2023-08-27 08:29:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:41,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:41,632 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 08:29:41,633 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 08:29:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:41,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:29:41,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:42,042 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 08:29:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:42,120 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 16 treesize of output 18 [2023-08-27 08:29:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:42,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:42,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:42,277 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 92 treesize of output 84 [2023-08-27 08:29:42,280 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 72 treesize of output 60 [2023-08-27 08:29:42,284 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 26 [2023-08-27 08:29:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:29:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210882940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:42,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:42,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-27 08:29:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575911447] [2023-08-27 08:29:42,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:42,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 08:29:42,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:42,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 08:29:42,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=420, Unknown=9, NotChecked=0, Total=506 [2023-08-27 08:29:42,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 473 [2023-08-27 08:29:42,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 396 transitions, 6211 flow. Second operand has 23 states, 23 states have (on average 140.69565217391303) internal successors, (3236), 23 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states 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 08:29:42,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:42,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 473 [2023-08-27 08:29:42,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:57,443 WARN L234 SmtUtils]: Spent 14.34s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:29:59,764 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 08:30:01,807 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 08:30:04,999 INFO L124 PetriNetUnfolderBase]: 10206/15340 cut-off events. [2023-08-27 08:30:04,999 INFO L125 PetriNetUnfolderBase]: For 200139/200313 co-relation queries the response was YES. [2023-08-27 08:30:05,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105453 conditions, 15340 events. 10206/15340 cut-off events. For 200139/200313 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 97311 event pairs, 1396 based on Foata normal form. 218/13425 useless extension candidates. Maximal degree in co-relation 105385. Up to 9157 conditions per place. [2023-08-27 08:30:05,138 INFO L140 encePairwiseOnDemand]: 461/473 looper letters, 406 selfloop transitions, 228 changer transitions 1/637 dead transitions. [2023-08-27 08:30:05,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 637 transitions, 10225 flow [2023-08-27 08:30:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:30:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:30:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2514 transitions. [2023-08-27 08:30:05,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3126476806367367 [2023-08-27 08:30:05,141 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2514 transitions. [2023-08-27 08:30:05,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2514 transitions. [2023-08-27 08:30:05,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:05,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2514 transitions. [2023-08-27 08:30:05,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 147.88235294117646) internal successors, (2514), 17 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states 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 08:30:05,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 473.0) internal successors, (8514), 18 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states 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 08:30:05,147 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 473.0) internal successors, (8514), 18 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states 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 08:30:05,147 INFO L175 Difference]: Start difference. First operand has 209 places, 396 transitions, 6211 flow. Second operand 17 states and 2514 transitions. [2023-08-27 08:30:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 637 transitions, 10225 flow [2023-08-27 08:30:06,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 637 transitions, 10034 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-27 08:30:06,733 INFO L231 Difference]: Finished difference. Result has 224 places, 464 transitions, 8277 flow [2023-08-27 08:30:06,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=6008, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8277, PETRI_PLACES=224, PETRI_TRANSITIONS=464} [2023-08-27 08:30:06,743 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2023-08-27 08:30:06,743 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 464 transitions, 8277 flow [2023-08-27 08:30:06,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 140.69565217391303) internal successors, (3236), 23 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states 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 08:30:06,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:06,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:06,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-27 08:30:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 08:30:06,949 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:30:06,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 253485443, now seen corresponding path program 2 times [2023-08-27 08:30:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102977804] [2023-08-27 08:30:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:07,978 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 08:30:07,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:07,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102977804] [2023-08-27 08:30:07,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102977804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:07,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415213164] [2023-08-27 08:30:07,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:30:07,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:07,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:07,979 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 08:30:07,980 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 08:30:08,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:30:08,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:08,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:30:08,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:08,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:08,360 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 08:30:08,400 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 08:30:08,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:30:08,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415213164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:30:08,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:30:08,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-08-27 08:30:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039227453] [2023-08-27 08:30:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:30:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:30:08,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:08,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:30:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:30:08,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 473 [2023-08-27 08:30:08,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 464 transitions, 8277 flow. Second operand has 7 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 08:30:08,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:08,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 473 [2023-08-27 08:30:08,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:10,810 INFO L124 PetriNetUnfolderBase]: 9948/14918 cut-off events. [2023-08-27 08:30:10,810 INFO L125 PetriNetUnfolderBase]: For 215068/215242 co-relation queries the response was YES. [2023-08-27 08:30:10,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105399 conditions, 14918 events. 9948/14918 cut-off events. For 215068/215242 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 93891 event pairs, 1769 based on Foata normal form. 236/13108 useless extension candidates. Maximal degree in co-relation 105329. Up to 11722 conditions per place. [2023-08-27 08:30:10,935 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 404 selfloop transitions, 105 changer transitions 0/511 dead transitions. [2023-08-27 08:30:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 511 transitions, 9970 flow [2023-08-27 08:30:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:30:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:30:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1047 transitions. [2023-08-27 08:30:10,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689217758985201 [2023-08-27 08:30:10,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1047 transitions. [2023-08-27 08:30:10,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1047 transitions. [2023-08-27 08:30:10,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:10,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1047 transitions. [2023-08-27 08:30:10,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.5) internal successors, (1047), 6 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 08:30:10,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:30:10,939 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:30:10,939 INFO L175 Difference]: Start difference. First operand has 224 places, 464 transitions, 8277 flow. Second operand 6 states and 1047 transitions. [2023-08-27 08:30:10,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 511 transitions, 9970 flow [2023-08-27 08:30:12,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 511 transitions, 9839 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-08-27 08:30:12,876 INFO L231 Difference]: Finished difference. Result has 224 places, 475 transitions, 8686 flow [2023-08-27 08:30:12,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=8146, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8686, PETRI_PLACES=224, PETRI_TRANSITIONS=475} [2023-08-27 08:30:12,876 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2023-08-27 08:30:12,877 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 475 transitions, 8686 flow [2023-08-27 08:30:12,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 08:30:12,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:12,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:12,882 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 08:30:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:13,082 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:30:13,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 878336255, now seen corresponding path program 1 times [2023-08-27 08:30:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114603566] [2023-08-27 08:30:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:13,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:30:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114603566] [2023-08-27 08:30:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114603566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355780324] [2023-08-27 08:30:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:13,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:13,856 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 08:30:13,858 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 08:30:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:13,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 08:30:13,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:14,230 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 08:30:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:14,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:14,348 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1415 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1415) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-27 08:30:14,403 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:14,403 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 08:30:14,412 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 08:30:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355780324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:14,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-27 08:30:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557916854] [2023-08-27 08:30:14,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:14,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:30:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:30:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=602, Unknown=1, NotChecked=50, Total=756 [2023-08-27 08:30:14,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 473 [2023-08-27 08:30:14,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 475 transitions, 8686 flow. Second operand has 28 states, 28 states have (on average 135.53571428571428) internal successors, (3795), 28 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states 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 08:30:14,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:14,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 473 [2023-08-27 08:30:14,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:22,361 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1415 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1415) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) .cse0) (<= c_~s~0 0) .cse0 (<= |c_thread2Thread1of1ForFork0_~j~0#1| 1))) is different from false [2023-08-27 08:30:29,501 INFO L124 PetriNetUnfolderBase]: 22268/32852 cut-off events. [2023-08-27 08:30:29,501 INFO L125 PetriNetUnfolderBase]: For 459415/459691 co-relation queries the response was YES. [2023-08-27 08:30:29,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228623 conditions, 32852 events. 22268/32852 cut-off events. For 459415/459691 co-relation queries the response was YES. Maximal size of possible extension queue 1874. Compared 227507 event pairs, 1758 based on Foata normal form. 406/27854 useless extension candidates. Maximal degree in co-relation 228551. Up to 21361 conditions per place. [2023-08-27 08:30:29,911 INFO L140 encePairwiseOnDemand]: 450/473 looper letters, 675 selfloop transitions, 699 changer transitions 0/1376 dead transitions. [2023-08-27 08:30:29,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1376 transitions, 24693 flow [2023-08-27 08:30:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-27 08:30:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-27 08:30:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7059 transitions. [2023-08-27 08:30:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30456918496785607 [2023-08-27 08:30:29,918 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7059 transitions. [2023-08-27 08:30:29,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7059 transitions. [2023-08-27 08:30:29,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:29,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7059 transitions. [2023-08-27 08:30:29,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 144.0612244897959) internal successors, (7059), 49 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states 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 08:30:29,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 473.0) internal successors, (23650), 50 states have internal predecessors, (23650), 0 states have call successors, (0), 0 states 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 08:30:29,954 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 473.0) internal successors, (23650), 50 states have internal predecessors, (23650), 0 states have call successors, (0), 0 states 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 08:30:29,954 INFO L175 Difference]: Start difference. First operand has 224 places, 475 transitions, 8686 flow. Second operand 49 states and 7059 transitions. [2023-08-27 08:30:29,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1376 transitions, 24693 flow [2023-08-27 08:30:35,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 1376 transitions, 24326 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-27 08:30:35,203 INFO L231 Difference]: Finished difference. Result has 295 places, 1028 transitions, 22253 flow [2023-08-27 08:30:35,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=8496, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=22253, PETRI_PLACES=295, PETRI_TRANSITIONS=1028} [2023-08-27 08:30:35,204 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 243 predicate places. [2023-08-27 08:30:35,204 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1028 transitions, 22253 flow [2023-08-27 08:30:35,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 135.53571428571428) internal successors, (3795), 28 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states 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 08:30:35,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:35,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:35,210 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 08:30:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:35,407 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:30:35,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 711306579, now seen corresponding path program 3 times [2023-08-27 08:30:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454357217] [2023-08-27 08:30:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:36,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454357217] [2023-08-27 08:30:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454357217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715415383] [2023-08-27 08:30:36,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:30:36,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:36,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:36,139 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 08:30:36,148 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 08:30:36,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:30:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:36,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:30:36,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:36,309 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 39 treesize of output 37 [2023-08-27 08:30:36,471 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 08:30:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:36,525 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 08:30:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:30:36,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:30:36,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715415383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:30:36,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:30:36,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 08:30:36,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688805970] [2023-08-27 08:30:36,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:30:36,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:30:36,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:30:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:30:36,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 473 [2023-08-27 08:30:36,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1028 transitions, 22253 flow. Second operand has 8 states, 8 states have (on average 163.625) internal successors, (1309), 8 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states 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 08:30:36,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:36,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 473 [2023-08-27 08:30:36,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:44,546 INFO L124 PetriNetUnfolderBase]: 20588/30637 cut-off events. [2023-08-27 08:30:44,546 INFO L125 PetriNetUnfolderBase]: For 701186/701248 co-relation queries the response was YES. [2023-08-27 08:30:44,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275424 conditions, 30637 events. 20588/30637 cut-off events. For 701186/701248 co-relation queries the response was YES. Maximal size of possible extension queue 1657. Compared 213098 event pairs, 3678 based on Foata normal form. 263/26204 useless extension candidates. Maximal degree in co-relation 275326. Up to 19212 conditions per place. [2023-08-27 08:30:45,100 INFO L140 encePairwiseOnDemand]: 466/473 looper letters, 765 selfloop transitions, 351 changer transitions 0/1118 dead transitions. [2023-08-27 08:30:45,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1118 transitions, 25956 flow [2023-08-27 08:30:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:30:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:30:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1039 transitions. [2023-08-27 08:30:45,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36610288935870333 [2023-08-27 08:30:45,102 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1039 transitions. [2023-08-27 08:30:45,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1039 transitions. [2023-08-27 08:30:45,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:45,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1039 transitions. [2023-08-27 08:30:45,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.16666666666666) internal successors, (1039), 6 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:45,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:30:45,105 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states 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 08:30:45,105 INFO L175 Difference]: Start difference. First operand has 295 places, 1028 transitions, 22253 flow. Second operand 6 states and 1039 transitions. [2023-08-27 08:30:45,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1118 transitions, 25956 flow [2023-08-27 08:30:58,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1118 transitions, 23505 flow, removed 979 selfloop flow, removed 15 redundant places. [2023-08-27 08:30:58,061 INFO L231 Difference]: Finished difference. Result has 286 places, 1032 transitions, 21064 flow [2023-08-27 08:30:58,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=19895, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=21064, PETRI_PLACES=286, PETRI_TRANSITIONS=1032} [2023-08-27 08:30:58,062 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 234 predicate places. [2023-08-27 08:30:58,062 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1032 transitions, 21064 flow [2023-08-27 08:30:58,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.625) internal successors, (1309), 8 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states 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 08:30:58,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:58,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:58,069 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 08:30:58,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:58,266 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:30:58,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash -736548603, now seen corresponding path program 2 times [2023-08-27 08:30:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:58,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699418972] [2023-08-27 08:30:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:58,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:58,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699418972] [2023-08-27 08:30:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699418972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:30:58,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:30:58,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 08:30:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465793848] [2023-08-27 08:30:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:30:58,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:30:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:30:58,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:30:58,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 473 [2023-08-27 08:30:58,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1032 transitions, 21064 flow. Second operand has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:30:58,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:58,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 473 [2023-08-27 08:30:58,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:31:07,661 INFO L124 PetriNetUnfolderBase]: 24573/36407 cut-off events. [2023-08-27 08:31:07,661 INFO L125 PetriNetUnfolderBase]: For 700526/700875 co-relation queries the response was YES. [2023-08-27 08:31:07,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306036 conditions, 36407 events. 24573/36407 cut-off events. For 700526/700875 co-relation queries the response was YES. Maximal size of possible extension queue 2147. Compared 258874 event pairs, 4022 based on Foata normal form. 265/28787 useless extension candidates. Maximal degree in co-relation 305946. Up to 23982 conditions per place. [2023-08-27 08:31:08,099 INFO L140 encePairwiseOnDemand]: 469/473 looper letters, 1044 selfloop transitions, 229 changer transitions 0/1279 dead transitions. [2023-08-27 08:31:08,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1279 transitions, 29024 flow [2023-08-27 08:31:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:31:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:31:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 856 transitions. [2023-08-27 08:31:08,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2023-08-27 08:31:08,101 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 856 transitions. [2023-08-27 08:31:08,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 856 transitions. [2023-08-27 08:31:08,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:31:08,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 856 transitions. [2023-08-27 08:31:08,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 08:31:08,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:31:08,103 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:31:08,103 INFO L175 Difference]: Start difference. First operand has 286 places, 1032 transitions, 21064 flow. Second operand 4 states and 856 transitions. [2023-08-27 08:31:08,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1279 transitions, 29024 flow [2023-08-27 08:31:18,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1279 transitions, 28553 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-27 08:31:18,543 INFO L231 Difference]: Finished difference. Result has 287 places, 1095 transitions, 22830 flow [2023-08-27 08:31:18,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=20645, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=22830, PETRI_PLACES=287, PETRI_TRANSITIONS=1095} [2023-08-27 08:31:18,571 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 235 predicate places. [2023-08-27 08:31:18,572 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1095 transitions, 22830 flow [2023-08-27 08:31:18,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 08:31:18,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:31:18,572 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 08:31:18,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-27 08:31:18,572 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:31:18,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:31:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2092727606, now seen corresponding path program 1 times [2023-08-27 08:31:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:31:18,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390835593] [2023-08-27 08:31:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:31:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:31:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:31:18,801 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 08:31:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:31:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390835593] [2023-08-27 08:31:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390835593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:31:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610577806] [2023-08-27 08:31:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:31:18,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:31:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:31:18,803 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 08:31:18,805 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 08:31:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:31:18,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:31:18,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:31:19,102 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 08:31:19,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:31:19,124 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:31:19,124 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 08:31:19,328 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 08:31:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610577806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:31:19,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:31:19,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 08:31:19,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812088894] [2023-08-27 08:31:19,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:31:19,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:31:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:31:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:31:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:31:19,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 473 [2023-08-27 08:31:19,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1095 transitions, 22830 flow. Second operand has 17 states, 17 states have (on average 150.47058823529412) internal successors, (2558), 17 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states 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 08:31:19,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:31:19,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 473 [2023-08-27 08:31:19,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:31:29,598 INFO L124 PetriNetUnfolderBase]: 25493/38423 cut-off events. [2023-08-27 08:31:29,598 INFO L125 PetriNetUnfolderBase]: For 821696/822141 co-relation queries the response was YES. [2023-08-27 08:31:29,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335962 conditions, 38423 events. 25493/38423 cut-off events. For 821696/822141 co-relation queries the response was YES. Maximal size of possible extension queue 2296. Compared 282169 event pairs, 3987 based on Foata normal form. 28/30591 useless extension candidates. Maximal degree in co-relation 335871. Up to 25329 conditions per place. [2023-08-27 08:31:30,066 INFO L140 encePairwiseOnDemand]: 461/473 looper letters, 1260 selfloop transitions, 357 changer transitions 4/1627 dead transitions. [2023-08-27 08:31:30,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1627 transitions, 33157 flow [2023-08-27 08:31:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 08:31:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 08:31:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1739 transitions. [2023-08-27 08:31:30,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342302517778205 [2023-08-27 08:31:30,068 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1739 transitions. [2023-08-27 08:31:30,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1739 transitions. [2023-08-27 08:31:30,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:31:30,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1739 transitions. [2023-08-27 08:31:30,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 158.0909090909091) internal successors, (1739), 11 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states 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 08:31:30,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 473.0) internal successors, (5676), 12 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states 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 08:31:30,095 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 473.0) internal successors, (5676), 12 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states 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 08:31:30,095 INFO L175 Difference]: Start difference. First operand has 287 places, 1095 transitions, 22830 flow. Second operand 11 states and 1739 transitions. [2023-08-27 08:31:30,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1627 transitions, 33157 flow [2023-08-27 08:31:42,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1627 transitions, 32597 flow, removed 240 selfloop flow, removed 2 redundant places. [2023-08-27 08:31:42,917 INFO L231 Difference]: Finished difference. Result has 298 places, 1116 transitions, 23651 flow [2023-08-27 08:31:42,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=22514, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23651, PETRI_PLACES=298, PETRI_TRANSITIONS=1116} [2023-08-27 08:31:42,917 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 246 predicate places. [2023-08-27 08:31:42,918 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 1116 transitions, 23651 flow [2023-08-27 08:31:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 150.47058823529412) internal successors, (2558), 17 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states 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 08:31:42,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:31:42,918 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 08:31:42,923 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 08:31:43,122 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 08:31:43,123 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:31:43,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:31:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1514971880, now seen corresponding path program 1 times [2023-08-27 08:31:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:31:43,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817931039] [2023-08-27 08:31:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:31:43,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:31:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:31:43,559 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 08:31:43,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:31:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817931039] [2023-08-27 08:31:43,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817931039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:31:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930458072] [2023-08-27 08:31:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:31:43,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:31:43,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:31:43,564 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 08:31:43,567 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 08:31:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:31:43,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:31:43,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:31:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:31:43,831 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 08:31:43,853 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 08:31:43,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:31:43,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930458072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:31:43,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:31:43,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 08:31:43,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671298817] [2023-08-27 08:31:43,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:31:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:31:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:31:43,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:31:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:31:43,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 473 [2023-08-27 08:31:43,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 1116 transitions, 23651 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 08:31:43,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:31:43,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 473 [2023-08-27 08:31:43,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:31:54,038 INFO L124 PetriNetUnfolderBase]: 25106/37924 cut-off events. [2023-08-27 08:31:54,038 INFO L125 PetriNetUnfolderBase]: For 842196/842617 co-relation queries the response was YES. [2023-08-27 08:31:54,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343986 conditions, 37924 events. 25106/37924 cut-off events. For 842196/842617 co-relation queries the response was YES. Maximal size of possible extension queue 2293. Compared 279101 event pairs, 4315 based on Foata normal form. 28/32521 useless extension candidates. Maximal degree in co-relation 343893. Up to 24830 conditions per place. [2023-08-27 08:31:54,653 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 860 selfloop transitions, 325 changer transitions 0/1191 dead transitions. [2023-08-27 08:31:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1191 transitions, 27019 flow [2023-08-27 08:31:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:31:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:31:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 700 transitions. [2023-08-27 08:31:54,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2023-08-27 08:31:54,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 700 transitions. [2023-08-27 08:31:54,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 700 transitions. [2023-08-27 08:31:54,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:31:54,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 700 transitions. [2023-08-27 08:31:54,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 08:31:54,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:31:54,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:31:54,656 INFO L175 Difference]: Start difference. First operand has 298 places, 1116 transitions, 23651 flow. Second operand 4 states and 700 transitions. [2023-08-27 08:31:54,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1191 transitions, 27019 flow [2023-08-27 08:32:07,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1191 transitions, 26481 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-27 08:32:07,929 INFO L231 Difference]: Finished difference. Result has 296 places, 1118 transitions, 23862 flow [2023-08-27 08:32:07,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=23086, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=23862, PETRI_PLACES=296, PETRI_TRANSITIONS=1118} [2023-08-27 08:32:07,939 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 244 predicate places. [2023-08-27 08:32:07,939 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 1118 transitions, 23862 flow [2023-08-27 08:32:07,939 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 08:32:07,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:32:07,939 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 08:32:07,944 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 08:32:08,144 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 08:32:08,144 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:32:08,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:32:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2088749511, now seen corresponding path program 1 times [2023-08-27 08:32:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:32:08,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213560457] [2023-08-27 08:32:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:32:08,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:32:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:32:08,635 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 08:32:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:32:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213560457] [2023-08-27 08:32:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213560457] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:32:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369605544] [2023-08-27 08:32:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:32:08,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:32:08,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:32:08,636 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 08:32:08,638 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 08:32:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:32:08,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 08:32:08,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:32:08,878 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 08:32:08,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:32:08,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369605544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:32:08,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:32:08,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-08-27 08:32:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537048044] [2023-08-27 08:32:08,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:32:08,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:32:08,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:32:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:32:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:32:08,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 473 [2023-08-27 08:32:08,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1118 transitions, 23862 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 08:32:08,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:32:08,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 473 [2023-08-27 08:32:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:32:19,816 INFO L124 PetriNetUnfolderBase]: 28005/41727 cut-off events. [2023-08-27 08:32:19,816 INFO L125 PetriNetUnfolderBase]: For 903811/904236 co-relation queries the response was YES. [2023-08-27 08:32:20,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387942 conditions, 41727 events. 28005/41727 cut-off events. For 903811/904236 co-relation queries the response was YES. Maximal size of possible extension queue 2279. Compared 299390 event pairs, 3314 based on Foata normal form. 28/35771 useless extension candidates. Maximal degree in co-relation 387849. Up to 27729 conditions per place. [2023-08-27 08:32:20,732 INFO L140 encePairwiseOnDemand]: 464/473 looper letters, 947 selfloop transitions, 357 changer transitions 0/1310 dead transitions. [2023-08-27 08:32:20,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1310 transitions, 29190 flow [2023-08-27 08:32:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:32:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:32:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-27 08:32:20,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2023-08-27 08:32:20,734 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-27 08:32:20,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-27 08:32:20,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:32:20,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-27 08:32:20,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 08:32:20,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:32:20,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:32:20,736 INFO L175 Difference]: Start difference. First operand has 296 places, 1118 transitions, 23862 flow. Second operand 4 states and 740 transitions. [2023-08-27 08:32:20,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1310 transitions, 29190 flow [2023-08-27 08:32:35,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1310 transitions, 28595 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 08:32:35,531 INFO L231 Difference]: Finished difference. Result has 298 places, 1130 transitions, 24485 flow [2023-08-27 08:32:35,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=23267, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=24485, PETRI_PLACES=298, PETRI_TRANSITIONS=1130} [2023-08-27 08:32:35,532 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 246 predicate places. [2023-08-27 08:32:35,532 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 1130 transitions, 24485 flow [2023-08-27 08:32:35,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 08:32:35,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:32:35,532 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 08:32:35,538 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 08:32:35,737 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 08:32:35,738 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:32:35,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:32:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash -628007611, now seen corresponding path program 1 times [2023-08-27 08:32:35,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:32:35,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351480403] [2023-08-27 08:32:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:32:35,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:32:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:32:36,135 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 08:32:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:32:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351480403] [2023-08-27 08:32:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351480403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:32:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348986347] [2023-08-27 08:32:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:32:36,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:32:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:32:36,137 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 08:32:36,139 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 08:32:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:32:36,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:32:36,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:32:36,362 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 08:32:36,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:32:36,425 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 08:32:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:32:36,511 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 08:32:36,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:32:36,729 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 08:32:36,817 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 08:32:36,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:32:37,118 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:37,119 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 08:32:37,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:37,127 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 341 treesize of output 325 [2023-08-27 08:32:37,134 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 140 [2023-08-27 08:32:37,143 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 140 treesize of output 116 [2023-08-27 08:32:37,151 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 08:32:37,464 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 08:32:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348986347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:32:37,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:32:37,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-27 08:32:37,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653076009] [2023-08-27 08:32:37,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:32:37,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:32:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:32:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:32:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=394, Unknown=4, NotChecked=0, Total=462 [2023-08-27 08:32:37,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 473 [2023-08-27 08:32:37,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 1130 transitions, 24485 flow. Second operand has 22 states, 22 states have (on average 132.9090909090909) internal successors, (2924), 22 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states 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 08:32:37,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:32:37,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 473 [2023-08-27 08:32:37,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:32:40,244 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 08:32:42,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:05,148 INFO L124 PetriNetUnfolderBase]: 29905/44418 cut-off events. [2023-08-27 08:33:05,149 INFO L125 PetriNetUnfolderBase]: For 1014881/1015250 co-relation queries the response was YES. [2023-08-27 08:33:05,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423742 conditions, 44418 events. 29905/44418 cut-off events. For 1014881/1015250 co-relation queries the response was YES. Maximal size of possible extension queue 2246. Compared 317226 event pairs, 3237 based on Foata normal form. 34/38700 useless extension candidates. Maximal degree in co-relation 423648. Up to 29770 conditions per place. [2023-08-27 08:33:05,756 INFO L140 encePairwiseOnDemand]: 460/473 looper letters, 1452 selfloop transitions, 515 changer transitions 6/1979 dead transitions. [2023-08-27 08:33:05,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1979 transitions, 41090 flow [2023-08-27 08:33:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:33:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:33:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2504 transitions. [2023-08-27 08:33:05,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29410382898754994 [2023-08-27 08:33:05,760 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2504 transitions. [2023-08-27 08:33:05,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2504 transitions. [2023-08-27 08:33:05,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:33:05,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2504 transitions. [2023-08-27 08:33:05,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.11111111111111) internal successors, (2504), 18 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states 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 08:33:05,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 473.0) internal successors, (8987), 19 states have internal predecessors, (8987), 0 states have call successors, (0), 0 states 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 08:33:05,766 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 473.0) internal successors, (8987), 19 states have internal predecessors, (8987), 0 states have call successors, (0), 0 states 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 08:33:05,766 INFO L175 Difference]: Start difference. First operand has 298 places, 1130 transitions, 24485 flow. Second operand 18 states and 2504 transitions. [2023-08-27 08:33:05,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1979 transitions, 41090 flow [2023-08-27 08:33:22,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1979 transitions, 40706 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:33:22,832 INFO L231 Difference]: Finished difference. Result has 317 places, 1171 transitions, 26173 flow [2023-08-27 08:33:22,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=24092, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=26173, PETRI_PLACES=317, PETRI_TRANSITIONS=1171} [2023-08-27 08:33:22,833 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 265 predicate places. [2023-08-27 08:33:22,833 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 1171 transitions, 26173 flow [2023-08-27 08:33:22,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 132.9090909090909) internal successors, (2924), 22 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states 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 08:33:22,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:33:22,833 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 08:33:22,839 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 08:33:23,038 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 08:33:23,039 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:33:23,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:33:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash -628007671, now seen corresponding path program 2 times [2023-08-27 08:33:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:33:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814566490] [2023-08-27 08:33:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:33:23,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:33:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:33:23,585 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 08:33:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:33:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814566490] [2023-08-27 08:33:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814566490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:33:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727031665] [2023-08-27 08:33:23,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:33:23,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:33:23,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:33:23,587 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 08:33:23,588 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 08:33:23,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:33:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:33:23,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:33:23,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:33:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:33:23,923 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 08:33:23,951 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 08:33:23,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:33:23,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727031665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:33:23,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:33:23,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 08:33:23,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113350194] [2023-08-27 08:33:23,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:33:23,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:33:23,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:33:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:33:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:33:23,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 473 [2023-08-27 08:33:23,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1171 transitions, 26173 flow. Second operand has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 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 08:33:23,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:33:23,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 473 [2023-08-27 08:33:23,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:33:36,603 INFO L124 PetriNetUnfolderBase]: 28239/42333 cut-off events. [2023-08-27 08:33:36,603 INFO L125 PetriNetUnfolderBase]: For 1097305/1097730 co-relation queries the response was YES. [2023-08-27 08:33:37,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421764 conditions, 42333 events. 28239/42333 cut-off events. For 1097305/1097730 co-relation queries the response was YES. Maximal size of possible extension queue 1972. Compared 303431 event pairs, 2946 based on Foata normal form. 250/39377 useless extension candidates. Maximal degree in co-relation 421666. Up to 28006 conditions per place. [2023-08-27 08:33:37,433 INFO L140 encePairwiseOnDemand]: 465/473 looper letters, 987 selfloop transitions, 362 changer transitions 0/1355 dead transitions. [2023-08-27 08:33:37,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1355 transitions, 31569 flow [2023-08-27 08:33:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:33:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:33:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 680 transitions. [2023-08-27 08:33:37,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594080338266385 [2023-08-27 08:33:37,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 680 transitions. [2023-08-27 08:33:37,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 680 transitions. [2023-08-27 08:33:37,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:33:37,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 680 transitions. [2023-08-27 08:33:37,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 08:33:37,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:33:37,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:33:37,436 INFO L175 Difference]: Start difference. First operand has 317 places, 1171 transitions, 26173 flow. Second operand 4 states and 680 transitions. [2023-08-27 08:33:37,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1355 transitions, 31569 flow [2023-08-27 08:33:55,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1355 transitions, 30981 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-08-27 08:33:55,549 INFO L231 Difference]: Finished difference. Result has 313 places, 1177 transitions, 26808 flow [2023-08-27 08:33:55,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=25522, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=26808, PETRI_PLACES=313, PETRI_TRANSITIONS=1177} [2023-08-27 08:33:55,550 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 261 predicate places. [2023-08-27 08:33:55,550 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 1177 transitions, 26808 flow [2023-08-27 08:33:55,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 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 08:33:55,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:33:55,550 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 08:33:55,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-27 08:33:55,755 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 08:33:55,755 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:33:55,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:33:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash -438583056, now seen corresponding path program 1 times [2023-08-27 08:33:55,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:33:55,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407993861] [2023-08-27 08:33:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:33:55,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:33:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:33:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:33:55,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:33:55,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407993861] [2023-08-27 08:33:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407993861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:33:55,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:33:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:33:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606738288] [2023-08-27 08:33:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:33:55,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:33:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:33:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:33:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:33:55,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 473 [2023-08-27 08:33:55,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 1177 transitions, 26808 flow. Second operand has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 08:33:55,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:33:55,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 473 [2023-08-27 08:33:55,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:34:08,366 INFO L124 PetriNetUnfolderBase]: 26262/40334 cut-off events. [2023-08-27 08:34:08,366 INFO L125 PetriNetUnfolderBase]: For 1267317/1267742 co-relation queries the response was YES. [2023-08-27 08:34:08,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414804 conditions, 40334 events. 26262/40334 cut-off events. For 1267317/1267742 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 296891 event pairs, 4064 based on Foata normal form. 3222/41062 useless extension candidates. Maximal degree in co-relation 414706. Up to 25832 conditions per place. [2023-08-27 08:34:09,061 INFO L140 encePairwiseOnDemand]: 464/473 looper letters, 923 selfloop transitions, 283 changer transitions 232/1444 dead transitions. [2023-08-27 08:34:09,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1444 transitions, 33630 flow [2023-08-27 08:34:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:34:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:34:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 852 transitions. [2023-08-27 08:34:09,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2023-08-27 08:34:09,063 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 852 transitions. [2023-08-27 08:34:09,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 852 transitions. [2023-08-27 08:34:09,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:34:09,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 852 transitions. [2023-08-27 08:34:09,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 08:34:09,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:34:09,065 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 473.0) internal successors, (2365), 5 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states 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 08:34:09,065 INFO L175 Difference]: Start difference. First operand has 313 places, 1177 transitions, 26808 flow. Second operand 4 states and 852 transitions. [2023-08-27 08:34:09,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1444 transitions, 33630 flow [2023-08-27 08:34:29,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1444 transitions, 33145 flow, removed 50 selfloop flow, removed 2 redundant places. [2023-08-27 08:34:29,653 INFO L231 Difference]: Finished difference. Result has 315 places, 997 transitions, 21685 flow [2023-08-27 08:34:29,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=26332, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=909, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21685, PETRI_PLACES=315, PETRI_TRANSITIONS=997} [2023-08-27 08:34:29,654 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 263 predicate places. [2023-08-27 08:34:29,654 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 997 transitions, 21685 flow [2023-08-27 08:34:29,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 08:34:29,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:34:29,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:34:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-27 08:34:29,654 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:34:29,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:34:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1281746551, now seen corresponding path program 1 times [2023-08-27 08:34:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:34:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672851183] [2023-08-27 08:34:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:34:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:34:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:34:29,967 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 08:34:29,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:34:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672851183] [2023-08-27 08:34:29,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672851183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:34:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025922780] [2023-08-27 08:34:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:34:29,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:34:29,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:34:29,968 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 08:34:29,970 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 08:34:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:34:30,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 08:34:30,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:34:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:34:30,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:34:30,186 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 08:34:30,186 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 08:34:30,258 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 08:34:30,299 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:34:30,300 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 08:34:30,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:34:30,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:34:30,373 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 6 treesize of output 5 [2023-08-27 08:34:30,402 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 6 treesize of output 5 [2023-08-27 08:34:30,585 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:34:30,586 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 08:34:30,610 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 08:34:30,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:34:33,224 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:34:33,225 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 67 treesize of output 55 [2023-08-27 08:34:33,237 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 08:34:33,238 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 628 treesize of output 599 [2023-08-27 08:34:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:34:33,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 206 [2023-08-27 08:34:33,263 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 08:34:33,263 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 274 treesize of output 248 [2023-08-27 08:34:33,274 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 08:34:33,274 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 248 treesize of output 196 [2023-08-27 08:34:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:34:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025922780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:34:33,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:34:33,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-27 08:34:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925903314] [2023-08-27 08:34:33,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:34:33,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:34:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:34:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:34:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1012, Unknown=14, NotChecked=0, Total=1190 [2023-08-27 08:34:33,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 473 [2023-08-27 08:34:33,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 997 transitions, 21685 flow. Second operand has 35 states, 35 states have (on average 135.42857142857142) internal successors, (4740), 35 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states 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 08:34:33,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:34:33,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 473 [2023-08-27 08:34:33,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:35:00,997 INFO L124 PetriNetUnfolderBase]: 31452/47590 cut-off events. [2023-08-27 08:35:00,997 INFO L125 PetriNetUnfolderBase]: For 1521502/1521535 co-relation queries the response was YES. [2023-08-27 08:35:01,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501007 conditions, 47590 events. 31452/47590 cut-off events. For 1521502/1521535 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 345228 event pairs, 5440 based on Foata normal form. 170/44800 useless extension candidates. Maximal degree in co-relation 500907. Up to 31288 conditions per place. [2023-08-27 08:35:01,940 INFO L140 encePairwiseOnDemand]: 461/473 looper letters, 1262 selfloop transitions, 532 changer transitions 4/1800 dead transitions. [2023-08-27 08:35:01,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1800 transitions, 40478 flow [2023-08-27 08:35:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:35:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:35:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4179 transitions. [2023-08-27 08:35:01,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30465845301450756 [2023-08-27 08:35:01,961 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4179 transitions. [2023-08-27 08:35:01,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4179 transitions. [2023-08-27 08:35:01,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:35:01,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4179 transitions. [2023-08-27 08:35:01,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 144.10344827586206) internal successors, (4179), 29 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states 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 08:35:01,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 473.0) internal successors, (14190), 30 states have internal predecessors, (14190), 0 states have call successors, (0), 0 states 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 08:35:01,971 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 473.0) internal successors, (14190), 30 states have internal predecessors, (14190), 0 states have call successors, (0), 0 states 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 08:35:01,971 INFO L175 Difference]: Start difference. First operand has 315 places, 997 transitions, 21685 flow. Second operand 29 states and 4179 transitions. [2023-08-27 08:35:01,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1800 transitions, 40478 flow [2023-08-27 08:35:23,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1800 transitions, 39354 flow, removed 345 selfloop flow, removed 12 redundant places. [2023-08-27 08:35:23,047 INFO L231 Difference]: Finished difference. Result has 338 places, 1267 transitions, 28724 flow [2023-08-27 08:35:23,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=21080, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28724, PETRI_PLACES=338, PETRI_TRANSITIONS=1267} [2023-08-27 08:35:23,047 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 286 predicate places. [2023-08-27 08:35:23,048 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1267 transitions, 28724 flow [2023-08-27 08:35:23,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 135.42857142857142) internal successors, (4740), 35 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states 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 08:35:23,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:35:23,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:35:23,053 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 08:35:23,253 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,SelfDestructingSolverStorable39 [2023-08-27 08:35:23,253 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:35:23,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:35:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash 38322528, now seen corresponding path program 1 times [2023-08-27 08:35:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:35:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423704736] [2023-08-27 08:35:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:35:23,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:35:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:35:23,721 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 08:35:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:35:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423704736] [2023-08-27 08:35:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423704736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:35:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696689240] [2023-08-27 08:35:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:35:23,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:35:23,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:35:23,722 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 08:35:23,724 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 08:35:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:35:23,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 08:35:23,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:35:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:35:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:35:23,950 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 08:35:23,950 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 08:35:24,059 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 08:35:24,130 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:35:24,130 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 08:35:24,175 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 08:35:24,196 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 08:35:24,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:35:24,251 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 08:35:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:35:24,317 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 08:35:24,612 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:35:24,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:24,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 15 [2023-08-27 08:35:24,647 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 08:35:24,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:35:25,332 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:25,332 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 100 treesize of output 76 [2023-08-27 08:35:25,379 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:25,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 805 treesize of output 791 [2023-08-27 08:35:25,412 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:25,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 361 treesize of output 303 [2023-08-27 08:35:25,448 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:25,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 196 [2023-08-27 08:35:25,481 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:25,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 183 [2023-08-27 08:35:30,204 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 08:35:30,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696689240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:35:30,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:35:30,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-27 08:35:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717667496] [2023-08-27 08:35:30,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:35:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:35:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:35:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:35:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1050, Unknown=6, NotChecked=0, Total=1190 [2023-08-27 08:35:30,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 473 [2023-08-27 08:35:30,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1267 transitions, 28724 flow. Second operand has 35 states, 35 states have (on average 135.42857142857142) internal successors, (4740), 35 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states 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 08:35:30,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:35:30,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 473 [2023-08-27 08:35:30,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:35:33,757 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 08:35:36,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:35:39,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:35:42,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:35:52,861 WARN L539 Checker$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 08:36:26,278 INFO L124 PetriNetUnfolderBase]: 41048/61955 cut-off events. [2023-08-27 08:36:26,278 INFO L125 PetriNetUnfolderBase]: For 2089863/2089896 co-relation queries the response was YES. [2023-08-27 08:36:27,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657301 conditions, 61955 events. 41048/61955 cut-off events. For 2089863/2089896 co-relation queries the response was YES. Maximal size of possible extension queue 2827. Compared 467027 event pairs, 5877 based on Foata normal form. 905/59431 useless extension candidates. Maximal degree in co-relation 657192. Up to 41140 conditions per place. [2023-08-27 08:36:27,641 INFO L140 encePairwiseOnDemand]: 459/473 looper letters, 1650 selfloop transitions, 1008 changer transitions 9/2669 dead transitions. [2023-08-27 08:36:27,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2669 transitions, 59235 flow [2023-08-27 08:36:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-27 08:36:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-27 08:36:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 8810 transitions. [2023-08-27 08:36:27,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30041601309418264 [2023-08-27 08:36:27,649 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 8810 transitions. [2023-08-27 08:36:27,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 8810 transitions. [2023-08-27 08:36:27,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:36:27,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 8810 transitions. [2023-08-27 08:36:27,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 142.09677419354838) internal successors, (8810), 62 states have internal predecessors, (8810), 0 states have call successors, (0), 0 states 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 08:36:27,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 473.0) internal successors, (29799), 63 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states 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 08:36:27,671 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 473.0) internal successors, (29799), 63 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states 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 08:36:27,671 INFO L175 Difference]: Start difference. First operand has 338 places, 1267 transitions, 28724 flow. Second operand 62 states and 8810 transitions. [2023-08-27 08:36:27,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 2669 transitions, 59235 flow [2023-08-27 08:36:56,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 2669 transitions, 58077 flow, removed 539 selfloop flow, removed 5 redundant places. [2023-08-27 08:36:56,233 INFO L231 Difference]: Finished difference. Result has 424 places, 1894 transitions, 44996 flow [2023-08-27 08:36:56,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=28026, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=44996, PETRI_PLACES=424, PETRI_TRANSITIONS=1894} [2023-08-27 08:36:56,234 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 372 predicate places. [2023-08-27 08:36:56,234 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1894 transitions, 44996 flow [2023-08-27 08:36:56,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 135.42857142857142) internal successors, (4740), 35 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states 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 08:36:56,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:36:56,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:36:56,243 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 08:36:56,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:36:56,439 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:36:56,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:36:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2145207757, now seen corresponding path program 3 times [2023-08-27 08:36:56,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:36:56,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078587860] [2023-08-27 08:36:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:36:56,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:36:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:36:57,986 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 08:36:57,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:36:57,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078587860] [2023-08-27 08:36:57,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078587860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:36:57,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183155789] [2023-08-27 08:36:57,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:36:57,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:36:57,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:36:57,987 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 08:36:57,989 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 08:36:58,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:36:58,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:36:58,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 08:36:58,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:36:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:36:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:36:58,462 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 08:36:58,462 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 08:36:59,019 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 08:36:59,351 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:36:59,351 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 08:36:59,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:36:59,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:36:59,948 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 6 treesize of output 5 [2023-08-27 08:37:00,238 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 6 treesize of output 5 [2023-08-27 08:37:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:37:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:37:01,876 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:37:01,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2023-08-27 08:37:02,070 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 08:37:02,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:37:05,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:37:05,826 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 132 treesize of output 96 [2023-08-27 08:37:06,110 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:37:06,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1090 treesize of output 1060 [2023-08-27 08:37:06,151 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:37:06,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:37:06,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 387 treesize of output 373 [2023-08-27 08:37:06,336 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:37:06,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:37:06,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 337 treesize of output 348 [2023-08-27 08:37:06,791 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:37:06,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 299 [2023-08-27 08:37:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:37:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183155789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:37:17,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:37:17,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-27 08:37:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101700456] [2023-08-27 08:37:17,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:37:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:37:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:37:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:37:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=967, Unknown=14, NotChecked=0, Total=1190 [2023-08-27 08:37:17,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 473 [2023-08-27 08:37:17,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1894 transitions, 44996 flow. Second operand has 35 states, 35 states have (on average 135.42857142857142) internal successors, (4740), 35 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states 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 08:37:17,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:37:17,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 473 [2023-08-27 08:37:17,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:37:29,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 08:37:32,040 WARN L539 Checker$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 08:38:36,250 INFO L124 PetriNetUnfolderBase]: 57284/84786 cut-off events. [2023-08-27 08:38:36,250 INFO L125 PetriNetUnfolderBase]: For 3651515/3651548 co-relation queries the response was YES. [2023-08-27 08:38:38,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957777 conditions, 84786 events. 57284/84786 cut-off events. For 3651515/3651548 co-relation queries the response was YES. Maximal size of possible extension queue 4294. Compared 644389 event pairs, 8354 based on Foata normal form. 2988/82744 useless extension candidates. Maximal degree in co-relation 957637. Up to 57025 conditions per place. [2023-08-27 08:38:38,694 INFO L140 encePairwiseOnDemand]: 459/473 looper letters, 1849 selfloop transitions, 1272 changer transitions 2/3125 dead transitions. [2023-08-27 08:38:38,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 3125 transitions, 76474 flow [2023-08-27 08:38:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 08:38:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 08:38:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6320 transitions. [2023-08-27 08:38:38,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3036709590620796 [2023-08-27 08:38:38,702 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6320 transitions. [2023-08-27 08:38:38,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6320 transitions. [2023-08-27 08:38:38,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:38:38,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6320 transitions. [2023-08-27 08:38:38,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 143.63636363636363) internal successors, (6320), 44 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states 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 08:38:38,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 473.0) internal successors, (21285), 45 states have internal predecessors, (21285), 0 states have call successors, (0), 0 states 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 08:38:38,723 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 473.0) internal successors, (21285), 45 states have internal predecessors, (21285), 0 states have call successors, (0), 0 states 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 08:38:38,723 INFO L175 Difference]: Start difference. First operand has 424 places, 1894 transitions, 44996 flow. Second operand 44 states and 6320 transitions. [2023-08-27 08:38:38,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 3125 transitions, 76474 flow [2023-08-27 08:39:47,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 3125 transitions, 74054 flow, removed 1161 selfloop flow, removed 17 redundant places. [2023-08-27 08:39:47,761 INFO L231 Difference]: Finished difference. Result has 469 places, 2458 transitions, 61377 flow [2023-08-27 08:39:47,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=40084, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=699, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=908, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=61377, PETRI_PLACES=469, PETRI_TRANSITIONS=2458} [2023-08-27 08:39:47,762 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 417 predicate places. [2023-08-27 08:39:47,762 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 2458 transitions, 61377 flow [2023-08-27 08:39:47,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 135.42857142857142) internal successors, (4740), 35 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states 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 08:39:47,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:39:47,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:39:47,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-27 08:39:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:39:47,967 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 08:39:47,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:39:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -99696965, now seen corresponding path program 2 times [2023-08-27 08:39:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:39:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461240369] [2023-08-27 08:39:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:39:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:39:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:39:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:39:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:39:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461240369] [2023-08-27 08:39:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461240369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:39:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884758035] [2023-08-27 08:39:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:39:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:39:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:39:50,084 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 08:39:50,085 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 08:39:50,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:39:50,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:39:50,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:39:50,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:39:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:39:51,410 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 19 treesize of output 21 [2023-08-27 08:39:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:39:52,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:39:53,330 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:39:53,331 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 44 treesize of output 37 [2023-08-27 08:39:53,361 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 10 treesize of output 3 [2023-08-27 08:39:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:39:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884758035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:39:54,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:39:54,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-27 08:39:54,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362853828] [2023-08-27 08:39:54,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:39:54,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 08:39:54,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:39:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 08:39:54,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=831, Unknown=2, NotChecked=0, Total=930 [2023-08-27 08:39:54,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 473 [2023-08-27 08:39:54,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 2458 transitions, 61377 flow. Second operand has 31 states, 31 states have (on average 143.58064516129033) internal successors, (4451), 31 states have internal predecessors, (4451), 0 states have call successors, (0), 0 states 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 08:39:54,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:39:54,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 473 [2023-08-27 08:39:54,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:41:12,397 INFO L124 PetriNetUnfolderBase]: 66467/100295 cut-off events. [2023-08-27 08:41:12,397 INFO L125 PetriNetUnfolderBase]: For 4970045/4970078 co-relation queries the response was YES. [2023-08-27 08:41:14,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196511 conditions, 100295 events. 66467/100295 cut-off events. For 4970045/4970078 co-relation queries the response was YES. Maximal size of possible extension queue 5308. Compared 809611 event pairs, 8013 based on Foata normal form. 1036/96479 useless extension candidates. Maximal degree in co-relation 1196353. Up to 66480 conditions per place. [2023-08-27 08:41:15,357 INFO L140 encePairwiseOnDemand]: 462/473 looper letters, 2725 selfloop transitions, 1344 changer transitions 6/4077 dead transitions. [2023-08-27 08:41:15,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 4077 transitions, 108965 flow [2023-08-27 08:41:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 08:41:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 08:41:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5038 transitions. [2023-08-27 08:41:15,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227625088090204 [2023-08-27 08:41:15,362 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5038 transitions. [2023-08-27 08:41:15,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5038 transitions. [2023-08-27 08:41:15,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:41:15,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5038 transitions. [2023-08-27 08:41:15,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 152.66666666666666) internal successors, (5038), 33 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states 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 08:41:15,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 473.0) internal successors, (16082), 34 states have internal predecessors, (16082), 0 states have call successors, (0), 0 states 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 08:41:15,380 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 473.0) internal successors, (16082), 34 states have internal predecessors, (16082), 0 states have call successors, (0), 0 states 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 08:41:15,380 INFO L175 Difference]: Start difference. First operand has 469 places, 2458 transitions, 61377 flow. Second operand 33 states and 5038 transitions. [2023-08-27 08:41:15,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 4077 transitions, 108965 flow Received shutdown request... [2023-08-27 08:42:00,135 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:42:00,135 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:42:00,557 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (39 of 40 remaining) [2023-08-27 08:42:00,561 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 08:42:00,761 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,SelfDestructingSolverStorable42 [2023-08-27 08:42:00,762 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (38 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (37 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (36 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 40 remaining) [2023-08-27 08:42:00,776 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (18 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 40 remaining) [2023-08-27 08:42:00,777 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 40 remaining) [2023-08-27 08:42:00,778 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 40 remaining) [2023-08-27 08:42:00,778 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:42:00,788 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 08:42:00,788 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 08:42:00,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 08:42:00 BasicIcfg [2023-08-27 08:42:00,793 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 08:42:00,793 INFO L158 Benchmark]: Toolchain (without parser) took 820776.40ms. Allocated memory was 337.6MB in the beginning and 13.9GB in the end (delta: 13.6GB). Free memory was 313.8MB in the beginning and 8.4GB in the end (delta: -8.1GB). Peak memory consumption was 9.8GB. Max. memory is 16.0GB. [2023-08-27 08:42:00,793 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 337.6MB. Free memory is still 313.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 08:42:00,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.64ms. Allocated memory is still 337.6MB. Free memory was 313.3MB in the beginning and 301.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 08:42:00,793 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.78ms. Allocated memory is still 337.6MB. Free memory was 301.6MB in the beginning and 298.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:42:00,794 INFO L158 Benchmark]: Boogie Preprocessor took 36.78ms. Allocated memory is still 337.6MB. Free memory was 298.9MB in the beginning and 296.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:42:00,794 INFO L158 Benchmark]: RCFGBuilder took 623.87ms. Allocated memory is still 337.6MB. Free memory was 296.9MB in the beginning and 310.0MB in the end (delta: -13.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.0GB. [2023-08-27 08:42:00,794 INFO L158 Benchmark]: TraceAbstraction took 819854.43ms. Allocated memory was 337.6MB in the beginning and 13.9GB in the end (delta: 13.6GB). Free memory was 309.0MB in the beginning and 8.4GB in the end (delta: -8.1GB). Peak memory consumption was 9.8GB. Max. memory is 16.0GB. [2023-08-27 08:42:00,795 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 337.6MB. Free memory is still 313.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 207.64ms. Allocated memory is still 337.6MB. Free memory was 313.3MB in the beginning and 301.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.78ms. Allocated memory is still 337.6MB. Free memory was 301.6MB in the beginning and 298.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.78ms. Allocated memory is still 337.6MB. Free memory was 298.9MB in the beginning and 296.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 623.87ms. Allocated memory is still 337.6MB. Free memory was 296.9MB in the beginning and 310.0MB in the end (delta: -13.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.0GB. * TraceAbstraction took 819854.43ms. Allocated memory was 337.6MB in the beginning and 13.9GB in the end (delta: 13.6GB). Free memory was 309.0MB in the beginning and 8.4GB in the end (delta: -8.1GB). Peak memory consumption was 9.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.9s, 213 PlacesBefore, 52 PlacesAfterwards, 221 TransitionsBefore, 48 TransitionsAfterwards, 3352 CoEnabledTransitionPairs, 7 FixpointIterations, 136 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 25 TrivialYvCompositions, 11 ConcurrentYvCompositions, 12 ChoiceCompositions, 238 TotalNumberOfCompositions, 6384 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4167, independent: 4050, independent conditional: 0, independent unconditional: 4050, dependent: 117, dependent conditional: 0, dependent unconditional: 117, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1871, independent: 1838, independent conditional: 0, independent unconditional: 1838, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4167, independent: 2212, independent conditional: 0, independent unconditional: 2212, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 1871, unknown conditional: 0, unknown unconditional: 1871] , Statistics on independence cache: Total cache size (in pairs): 165, Positive cache size: 153, Positive conditional cache size: 0, Positive unconditional cache size: 153, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 271 locations, 40 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 819.7s, OverallIterations: 43, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 738.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.0s, HoareTripleCheckerStatistics: 641 mSolverCounterUnknown, 5465 SdHoareTripleChecker+Valid, 84.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5465 mSDsluCounter, 560 SdHoareTripleChecker+Invalid, 80.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1693 IncrementalHoareTripleChecker+Unchecked, 504 mSDsCounter, 1164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24062 IncrementalHoareTripleChecker+Invalid, 27560 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1164 mSolverCounterUnsat, 56 mSDtfsCounter, 24062 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1296 GetRequests, 431 SyntacticMatches, 8 SemanticMatches, 857 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 6322 ImplicationChecksByTransitivity, 111.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61377occurred in iteration=42, InterpolantAutomatonStates: 498, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 61.8s InterpolantComputationTime, 1031 NumberOfCodeBlocks, 988 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1225 ConstructedInterpolants, 132 QuantifiedInterpolants, 25262 SizeOfPredicates, 271 NumberOfNonLiveVariables, 7850 ConjunctsInSsa, 675 ConjunctsInUnsatCore, 96 InterpolantComputations, 25 PerfectInterpolantSequences, 315/599 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown