./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test2-1.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test2-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3cf10b967a6b35e74e5635ad2528d1917037f5847cda0e92ca33349ed0f01758 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 23:16:54,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 23:16:54,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 23:16:54,612 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 23:16:54,613 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 23:16:54,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 23:16:54,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 23:16:54,637 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 23:16:54,638 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 23:16:54,641 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 23:16:54,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 23:16:54,642 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 23:16:54,642 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 23:16:54,643 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 23:16:54,643 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 23:16:54,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 23:16:54,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 23:16:54,644 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 23:16:54,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 23:16:54,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 23:16:54,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 23:16:54,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 23:16:54,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 23:16:54,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 23:16:54,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 23:16:54,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 23:16:54,646 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 23:16:54,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 23:16:54,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 23:16:54,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 23:16:54,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 23:16:54,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 23:16:54,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 23:16:54,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 23:16:54,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 23:16:54,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 23:16:54,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 23:16:54,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 23:16:54,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 23:16:54,651 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 23:16:54,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 23:16:54,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 23:16:54,652 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cf10b967a6b35e74e5635ad2528d1917037f5847cda0e92ca33349ed0f01758 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 23:16:54,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 23:16:54,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 23:16:54,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 23:16:54,891 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 23:16:54,892 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 23:16:54,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test2-1.i [2023-11-22 23:16:56,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 23:16:56,298 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 23:16:56,300 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test2-1.i [2023-11-22 23:16:56,323 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8297e2d8c/4310d977028d4ac4a94dccf8b36e26a7/FLAGf274593ae [2023-11-22 23:16:56,340 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8297e2d8c/4310d977028d4ac4a94dccf8b36e26a7 [2023-11-22 23:16:56,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 23:16:56,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 23:16:56,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 23:16:56,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 23:16:56,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 23:16:56,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:56,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f6bbc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56, skipping insertion in model container [2023-11-22 23:16:56,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:56,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 23:16:56,592 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 23:16:56,710 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test2-1.i[37426,37439] [2023-11-22 23:16:56,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 23:16:56,828 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 23:16:56,851 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 23:16:56,861 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/uthash-2.0.2/uthash_BER_nondet_test2-1.i[37426,37439] [2023-11-22 23:16:56,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 23:16:56,956 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 23:16:56,956 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 23:16:56,962 INFO L206 MainTranslator]: Completed translation [2023-11-22 23:16:56,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56 WrapperNode [2023-11-22 23:16:56,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 23:16:56,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 23:16:56,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 23:16:56,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 23:16:56,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,064 INFO L138 Inliner]: procedures = 208, calls = 230, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1184 [2023-11-22 23:16:57,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 23:16:57,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 23:16:57,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 23:16:57,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 23:16:57,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,135 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 23:16:57,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 23:16:57,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 23:16:57,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 23:16:57,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (1/1) ... [2023-11-22 23:16:57,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 23:16:57,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:16:57,198 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) [2023-11-22 23:16:57,216 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 [2023-11-22 23:16:57,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-22 23:16:57,253 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-22 23:16:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 23:16:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-22 23:16:57,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-22 23:16:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 23:16:57,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 23:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 23:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 23:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 23:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-22 23:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 23:16:57,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 23:16:57,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 23:16:57,421 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 23:16:57,423 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 23:16:58,297 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 23:16:58,332 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 23:16:58,333 INFO L309 CfgBuilder]: Removed 54 assume(true) statements. [2023-11-22 23:16:58,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:16:58 BoogieIcfgContainer [2023-11-22 23:16:58,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 23:16:58,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 23:16:58,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 23:16:58,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 23:16:58,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:16:56" (1/3) ... [2023-11-22 23:16:58,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e07b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:16:58, skipping insertion in model container [2023-11-22 23:16:58,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:56" (2/3) ... [2023-11-22 23:16:58,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e07b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:16:58, skipping insertion in model container [2023-11-22 23:16:58,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:16:58" (3/3) ... [2023-11-22 23:16:58,342 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_nondet_test2-1.i [2023-11-22 23:16:58,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 23:16:58,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 23:16:58,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 23:16:58,407 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1b6ad4d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 23:16:58,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 23:16:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 321 states, 315 states have (on average 1.7079365079365079) internal successors, (538), 316 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:16:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 23:16:58,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:16:58,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:16:58,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:16:58,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:16:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash 252346162, now seen corresponding path program 1 times [2023-11-22 23:16:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:16:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34101204] [2023-11-22 23:16:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:16:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:16:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:16:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:16:58,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:16:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34101204] [2023-11-22 23:16:58,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34101204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:16:58,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:16:58,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 23:16:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006131369] [2023-11-22 23:16:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:16:58,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 23:16:58,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:16:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 23:16:58,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 23:16:58,638 INFO L87 Difference]: Start difference. First operand has 321 states, 315 states have (on average 1.7079365079365079) internal successors, (538), 316 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:16:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:16:58,806 INFO L93 Difference]: Finished difference Result 640 states and 1085 transitions. [2023-11-22 23:16:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 23:16:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-22 23:16:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:16:58,829 INFO L225 Difference]: With dead ends: 640 [2023-11-22 23:16:58,829 INFO L226 Difference]: Without dead ends: 318 [2023-11-22 23:16:58,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 23:16:58,836 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:16:58,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 481 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:16:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-22 23:16:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2023-11-22 23:16:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.5175718849840256) internal successors, (475), 313 states have internal predecessors, (475), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:16:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 481 transitions. [2023-11-22 23:16:58,880 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 481 transitions. Word has length 10 [2023-11-22 23:16:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:16:58,880 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 481 transitions. [2023-11-22 23:16:58,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:16:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 481 transitions. [2023-11-22 23:16:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-22 23:16:58,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:16:58,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:16:58,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 23:16:58,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:16:58,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:16:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -449410735, now seen corresponding path program 1 times [2023-11-22 23:16:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:16:58,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365399040] [2023-11-22 23:16:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:16:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:16:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:16:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:16:59,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:16:59,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365399040] [2023-11-22 23:16:59,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365399040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:16:59,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:16:59,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 23:16:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194954768] [2023-11-22 23:16:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:16:59,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 23:16:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:16:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 23:16:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:16:59,127 INFO L87 Difference]: Start difference. First operand 318 states and 481 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:16:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:16:59,227 INFO L93 Difference]: Finished difference Result 461 states and 699 transitions. [2023-11-22 23:16:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 23:16:59,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-22 23:16:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:16:59,230 INFO L225 Difference]: With dead ends: 461 [2023-11-22 23:16:59,230 INFO L226 Difference]: Without dead ends: 322 [2023-11-22 23:16:59,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:16:59,231 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 165 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:16:59,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1201 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 23:16:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-22 23:16:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2023-11-22 23:16:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.4952076677316295) internal successors, (468), 313 states have internal predecessors, (468), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:16:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 474 transitions. [2023-11-22 23:16:59,248 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 474 transitions. Word has length 65 [2023-11-22 23:16:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:16:59,249 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 474 transitions. [2023-11-22 23:16:59,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:16:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 474 transitions. [2023-11-22 23:16:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-22 23:16:59,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:16:59,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:16:59,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 23:16:59,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:16:59,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:16:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1085570211, now seen corresponding path program 1 times [2023-11-22 23:16:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:16:59,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088132883] [2023-11-22 23:16:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:16:59,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:16:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:16:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:16:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:16:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088132883] [2023-11-22 23:16:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088132883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:16:59,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:16:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:16:59,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754999459] [2023-11-22 23:16:59,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:16:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:16:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:16:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:16:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:16:59,705 INFO L87 Difference]: Start difference. First operand 318 states and 474 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:00,721 INFO L93 Difference]: Finished difference Result 711 states and 1070 transitions. [2023-11-22 23:17:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 23:17:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-22 23:17:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:00,724 INFO L225 Difference]: With dead ends: 711 [2023-11-22 23:17:00,724 INFO L226 Difference]: Without dead ends: 569 [2023-11-22 23:17:00,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-22 23:17:00,726 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 383 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:00,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 2582 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-22 23:17:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-11-22 23:17:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 320. [2023-11-22 23:17:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.492063492063492) internal successors, (470), 315 states have internal predecessors, (470), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 476 transitions. [2023-11-22 23:17:00,737 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 476 transitions. Word has length 65 [2023-11-22 23:17:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:00,738 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 476 transitions. [2023-11-22 23:17:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 476 transitions. [2023-11-22 23:17:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-22 23:17:00,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:00,742 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 23:17:00,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:00,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2036176521, now seen corresponding path program 1 times [2023-11-22 23:17:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181895052] [2023-11-22 23:17:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:00,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:00,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602960480] [2023-11-22 23:17:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:00,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:00,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:00,796 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) [2023-11-22 23:17:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 23:17:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:01,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 23:17:01,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:17:01,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:01,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:01,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181895052] [2023-11-22 23:17:01,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:01,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602960480] [2023-11-22 23:17:01,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602960480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:01,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:01,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 23:17:01,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772725295] [2023-11-22 23:17:01,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:01,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 23:17:01,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 23:17:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 23:17:01,171 INFO L87 Difference]: Start difference. First operand 320 states and 476 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:01,251 INFO L93 Difference]: Finished difference Result 657 states and 979 transitions. [2023-11-22 23:17:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 23:17:01,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-11-22 23:17:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:01,254 INFO L225 Difference]: With dead ends: 657 [2023-11-22 23:17:01,254 INFO L226 Difference]: Without dead ends: 341 [2023-11-22 23:17:01,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 23:17:01,260 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 9 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:01,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 888 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 23:17:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-22 23:17:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2023-11-22 23:17:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.462686567164179) internal successors, (490), 335 states have internal predecessors, (490), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 496 transitions. [2023-11-22 23:17:01,271 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 496 transitions. Word has length 141 [2023-11-22 23:17:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:01,272 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 496 transitions. [2023-11-22 23:17:01,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 496 transitions. [2023-11-22 23:17:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-22 23:17:01,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:01,278 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:01,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:01,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:01,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1994478477, now seen corresponding path program 1 times [2023-11-22 23:17:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:01,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353310951] [2023-11-22 23:17:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:01,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:01,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761745380] [2023-11-22 23:17:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:01,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:01,527 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) [2023-11-22 23:17:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 23:17:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:01,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 23:17:01,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:17:01,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:01,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:01,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353310951] [2023-11-22 23:17:01,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:01,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761745380] [2023-11-22 23:17:01,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761745380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:01,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 23:17:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978827301] [2023-11-22 23:17:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:01,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 23:17:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 23:17:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:17:01,805 INFO L87 Difference]: Start difference. First operand 340 states and 496 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:01,861 INFO L93 Difference]: Finished difference Result 663 states and 975 transitions. [2023-11-22 23:17:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 23:17:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-11-22 23:17:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:01,862 INFO L225 Difference]: With dead ends: 663 [2023-11-22 23:17:01,862 INFO L226 Difference]: Without dead ends: 327 [2023-11-22 23:17:01,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:17:01,863 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 165 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:01,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1180 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:17:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-22 23:17:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2023-11-22 23:17:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.4610591900311527) internal successors, (469), 321 states have internal predecessors, (469), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 475 transitions. [2023-11-22 23:17:01,870 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 475 transitions. Word has length 141 [2023-11-22 23:17:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:01,870 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 475 transitions. [2023-11-22 23:17:01,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 475 transitions. [2023-11-22 23:17:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-22 23:17:01,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:01,871 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:01,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:02,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:02,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1911694015, now seen corresponding path program 1 times [2023-11-22 23:17:02,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:02,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127434316] [2023-11-22 23:17:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:02,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:02,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:02,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919681679] [2023-11-22 23:17:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:02,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:02,129 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) [2023-11-22 23:17:02,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 23:17:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:02,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 23:17:02,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 23:17:02,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:02,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:02,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127434316] [2023-11-22 23:17:02,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:02,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919681679] [2023-11-22 23:17:02,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919681679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:02,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:02,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 23:17:02,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806762899] [2023-11-22 23:17:02,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:02,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 23:17:02,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 23:17:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 23:17:02,599 INFO L87 Difference]: Start difference. First operand 326 states and 475 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:02,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:02,643 INFO L93 Difference]: Finished difference Result 884 states and 1302 transitions. [2023-11-22 23:17:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 23:17:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-11-22 23:17:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:02,646 INFO L225 Difference]: With dead ends: 884 [2023-11-22 23:17:02,646 INFO L226 Difference]: Without dead ends: 562 [2023-11-22 23:17:02,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 23:17:02,647 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 300 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:02,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1074 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:17:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-22 23:17:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 560. [2023-11-22 23:17:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.481081081081081) internal successors, (822), 555 states have internal predecessors, (822), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 828 transitions. [2023-11-22 23:17:02,664 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 828 transitions. Word has length 141 [2023-11-22 23:17:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:02,666 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 828 transitions. [2023-11-22 23:17:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 23:17:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 828 transitions. [2023-11-22 23:17:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-22 23:17:02,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:02,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:02,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:02,881 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 [2023-11-22 23:17:02,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:02,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash 858451190, now seen corresponding path program 1 times [2023-11-22 23:17:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:02,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101966106] [2023-11-22 23:17:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:02,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:02,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845271672] [2023-11-22 23:17:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:02,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:02,925 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) [2023-11-22 23:17:02,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 23:17:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:03,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 23:17:03,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 23:17:03,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:03,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101966106] [2023-11-22 23:17:03,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845271672] [2023-11-22 23:17:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845271672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:03,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:03,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 23:17:03,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316199063] [2023-11-22 23:17:03,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:03,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 23:17:03,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 23:17:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:17:03,355 INFO L87 Difference]: Start difference. First operand 560 states and 828 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:03,520 INFO L93 Difference]: Finished difference Result 882 states and 1299 transitions. [2023-11-22 23:17:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 23:17:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 154 [2023-11-22 23:17:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:03,523 INFO L225 Difference]: With dead ends: 882 [2023-11-22 23:17:03,523 INFO L226 Difference]: Without dead ends: 443 [2023-11-22 23:17:03,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:17:03,524 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 767 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:03,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 777 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 23:17:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-22 23:17:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2023-11-22 23:17:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.4680365296803652) internal successors, (643), 438 states have internal predecessors, (643), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 649 transitions. [2023-11-22 23:17:03,534 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 649 transitions. Word has length 154 [2023-11-22 23:17:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:03,535 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 649 transitions. [2023-11-22 23:17:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 649 transitions. [2023-11-22 23:17:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-22 23:17:03,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:03,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:03,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:03,767 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 [2023-11-22 23:17:03,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:03,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 375254243, now seen corresponding path program 1 times [2023-11-22 23:17:03,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:03,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451310823] [2023-11-22 23:17:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:03,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:03,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372015189] [2023-11-22 23:17:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:03,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:03,804 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) [2023-11-22 23:17:03,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 23:17:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:04,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-22 23:17:04,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:04,176 INFO L378 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 [2023-11-22 23:17:04,216 INFO L349 Elim1Store]: treesize reduction 122, result has 10.9 percent of original size [2023-11-22 23:17:04,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 84 [2023-11-22 23:17:04,259 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2023-11-22 23:17:04,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 35 [2023-11-22 23:17:04,266 INFO L378 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 13 treesize of output 7 [2023-11-22 23:17:04,663 INFO L349 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2023-11-22 23:17:04,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 71 [2023-11-22 23:17:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 23:17:04,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:04,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:04,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451310823] [2023-11-22 23:17:04,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:04,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372015189] [2023-11-22 23:17:04,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372015189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:04,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:04,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-22 23:17:04,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76155466] [2023-11-22 23:17:04,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 23:17:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 23:17:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-22 23:17:04,829 INFO L87 Difference]: Start difference. First operand 443 states and 649 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:05,505 INFO L93 Difference]: Finished difference Result 984 states and 1436 transitions. [2023-11-22 23:17:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 23:17:05,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2023-11-22 23:17:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:05,508 INFO L225 Difference]: With dead ends: 984 [2023-11-22 23:17:05,508 INFO L226 Difference]: Without dead ends: 623 [2023-11-22 23:17:05,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-22 23:17:05,509 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 608 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:05,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2023 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 23:17:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-11-22 23:17:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 475. [2023-11-22 23:17:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 470 states have (on average 1.446808510638298) internal successors, (680), 470 states have internal predecessors, (680), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 686 transitions. [2023-11-22 23:17:05,519 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 686 transitions. Word has length 164 [2023-11-22 23:17:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:05,519 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 686 transitions. [2023-11-22 23:17:05,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 686 transitions. [2023-11-22 23:17:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-22 23:17:05,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:05,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:05,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-22 23:17:05,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:05,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:05,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1412615579, now seen corresponding path program 1 times [2023-11-22 23:17:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968750784] [2023-11-22 23:17:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:05,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:05,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243947910] [2023-11-22 23:17:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:05,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:05,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:05,780 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) [2023-11-22 23:17:05,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 23:17:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:06,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 23:17:06,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 23:17:06,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968750784] [2023-11-22 23:17:06,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243947910] [2023-11-22 23:17:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243947910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:06,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:06,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 23:17:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916921223] [2023-11-22 23:17:06,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:06,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 23:17:06,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 23:17:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:17:06,110 INFO L87 Difference]: Start difference. First operand 475 states and 686 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:06,201 INFO L93 Difference]: Finished difference Result 1036 states and 1533 transitions. [2023-11-22 23:17:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 23:17:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2023-11-22 23:17:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:06,203 INFO L225 Difference]: With dead ends: 1036 [2023-11-22 23:17:06,204 INFO L226 Difference]: Without dead ends: 663 [2023-11-22 23:17:06,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:17:06,206 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 145 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:06,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1330 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 23:17:06,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-22 23:17:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 498. [2023-11-22 23:17:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 1.4239350912778905) internal successors, (702), 493 states have internal predecessors, (702), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 708 transitions. [2023-11-22 23:17:06,219 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 708 transitions. Word has length 164 [2023-11-22 23:17:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:06,219 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 708 transitions. [2023-11-22 23:17:06,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 708 transitions. [2023-11-22 23:17:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-22 23:17:06,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:06,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:06,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:06,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:06,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:06,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2145512649, now seen corresponding path program 1 times [2023-11-22 23:17:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:06,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278266456] [2023-11-22 23:17:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:06,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:06,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:06,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534918299] [2023-11-22 23:17:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:06,479 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) [2023-11-22 23:17:06,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 23:17:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:06,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-22 23:17:06,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:06,789 INFO L378 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 [2023-11-22 23:17:06,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-22 23:17:06,808 INFO L378 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 [2023-11-22 23:17:06,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 23:17:06,975 INFO L378 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 45 treesize of output 23 [2023-11-22 23:17:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 23:17:07,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 23:17:07,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 23:17:07,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 1 [2023-11-22 23:17:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278266456] [2023-11-22 23:17:07,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534918299] [2023-11-22 23:17:07,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534918299] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 23:17:07,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 23:17:07,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2023-11-22 23:17:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892458751] [2023-11-22 23:17:07,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:07,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 23:17:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 23:17:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-22 23:17:07,359 INFO L87 Difference]: Start difference. First operand 498 states and 708 transitions. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:09,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-22 23:17:11,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:11,617 INFO L93 Difference]: Finished difference Result 954 states and 1357 transitions. [2023-11-22 23:17:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 23:17:11,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 165 [2023-11-22 23:17:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:11,620 INFO L225 Difference]: With dead ends: 954 [2023-11-22 23:17:11,620 INFO L226 Difference]: Without dead ends: 815 [2023-11-22 23:17:11,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-11-22 23:17:11,621 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 515 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:11,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 3085 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1745 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-11-22 23:17:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-11-22 23:17:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 529. [2023-11-22 23:17:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.4083969465648856) internal successors, (738), 524 states have internal predecessors, (738), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 744 transitions. [2023-11-22 23:17:11,638 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 744 transitions. Word has length 165 [2023-11-22 23:17:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:11,638 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 744 transitions. [2023-11-22 23:17:11,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 744 transitions. [2023-11-22 23:17:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-22 23:17:11,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:11,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:11,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:11,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:11,854 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:11,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1252061369, now seen corresponding path program 1 times [2023-11-22 23:17:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831328760] [2023-11-22 23:17:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:11,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979966577] [2023-11-22 23:17:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:11,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:11,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:11,906 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) [2023-11-22 23:17:11,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 23:17:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:12,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 23:17:12,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:12,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:12,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:12,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831328760] [2023-11-22 23:17:12,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:12,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979966577] [2023-11-22 23:17:12,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979966577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:12,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:12,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 23:17:12,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761101783] [2023-11-22 23:17:12,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:12,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 23:17:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 23:17:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 23:17:12,222 INFO L87 Difference]: Start difference. First operand 529 states and 744 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:12,262 INFO L93 Difference]: Finished difference Result 675 states and 960 transitions. [2023-11-22 23:17:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 23:17:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 165 [2023-11-22 23:17:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:12,264 INFO L225 Difference]: With dead ends: 675 [2023-11-22 23:17:12,264 INFO L226 Difference]: Without dead ends: 536 [2023-11-22 23:17:12,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 23:17:12,265 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 2 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:12,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 893 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:17:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-11-22 23:17:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 535. [2023-11-22 23:17:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 530 states have (on average 1.3981132075471698) internal successors, (741), 530 states have internal predecessors, (741), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 747 transitions. [2023-11-22 23:17:12,284 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 747 transitions. Word has length 165 [2023-11-22 23:17:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:12,284 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 747 transitions. [2023-11-22 23:17:12,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 747 transitions. [2023-11-22 23:17:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-22 23:17:12,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:12,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:12,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 23:17:12,517 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:12,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2133935929, now seen corresponding path program 1 times [2023-11-22 23:17:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:12,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23483003] [2023-11-22 23:17:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:12,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:12,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:12,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885487693] [2023-11-22 23:17:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:12,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:12,576 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) [2023-11-22 23:17:12,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 23:17:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:12,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 23:17:12,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:12,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:12,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23483003] [2023-11-22 23:17:12,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:12,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885487693] [2023-11-22 23:17:12,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885487693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:12,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 23:17:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902347983] [2023-11-22 23:17:12,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 23:17:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 23:17:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:17:12,925 INFO L87 Difference]: Start difference. First operand 535 states and 747 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:12,968 INFO L93 Difference]: Finished difference Result 635 states and 884 transitions. [2023-11-22 23:17:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 23:17:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 165 [2023-11-22 23:17:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:12,970 INFO L225 Difference]: With dead ends: 635 [2023-11-22 23:17:12,970 INFO L226 Difference]: Without dead ends: 490 [2023-11-22 23:17:12,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:17:12,972 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 78 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:12,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1045 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:17:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-11-22 23:17:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2023-11-22 23:17:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 485 states have (on average 1.3649484536082475) internal successors, (662), 485 states have internal predecessors, (662), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 668 transitions. [2023-11-22 23:17:12,986 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 668 transitions. Word has length 165 [2023-11-22 23:17:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:12,987 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 668 transitions. [2023-11-22 23:17:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 668 transitions. [2023-11-22 23:17:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-22 23:17:12,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:12,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:13,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:13,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:13,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1048748220, now seen corresponding path program 1 times [2023-11-22 23:17:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:13,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776824417] [2023-11-22 23:17:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:13,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:13,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:13,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816131081] [2023-11-22 23:17:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:13,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:13,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:13,243 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) [2023-11-22 23:17:13,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 23:17:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:13,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 23:17:13,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:13,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 23:17:13,800 INFO L378 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 44 treesize of output 22 [2023-11-22 23:17:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 23:17:14,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:14,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:14,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776824417] [2023-11-22 23:17:14,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816131081] [2023-11-22 23:17:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816131081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:14,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:14,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-22 23:17:14,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708478090] [2023-11-22 23:17:14,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:14,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 23:17:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:14,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 23:17:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-22 23:17:14,408 INFO L87 Difference]: Start difference. First operand 490 states and 668 transitions. Second operand has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 13 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:15,743 INFO L93 Difference]: Finished difference Result 913 states and 1254 transitions. [2023-11-22 23:17:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 23:17:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 13 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-11-22 23:17:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:15,746 INFO L225 Difference]: With dead ends: 913 [2023-11-22 23:17:15,746 INFO L226 Difference]: Without dead ends: 537 [2023-11-22 23:17:15,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-22 23:17:15,747 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 25 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:15,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2711 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-22 23:17:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-22 23:17:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 525. [2023-11-22 23:17:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.353846153846154) internal successors, (704), 520 states have internal predecessors, (704), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 710 transitions. [2023-11-22 23:17:15,763 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 710 transitions. Word has length 166 [2023-11-22 23:17:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:15,763 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 710 transitions. [2023-11-22 23:17:15,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 13 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 710 transitions. [2023-11-22 23:17:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-22 23:17:15,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:15,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:15,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:15,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 23:17:15,978 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:15,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1243736799, now seen corresponding path program 1 times [2023-11-22 23:17:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828318408] [2023-11-22 23:17:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:16,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:16,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805724307] [2023-11-22 23:17:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:16,016 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) [2023-11-22 23:17:16,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 23:17:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:16,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 23:17:16,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:16,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:16,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:16,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828318408] [2023-11-22 23:17:16,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805724307] [2023-11-22 23:17:16,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805724307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:16,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:16,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 23:17:16,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017377553] [2023-11-22 23:17:16,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:16,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 23:17:16,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 23:17:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-22 23:17:16,461 INFO L87 Difference]: Start difference. First operand 525 states and 710 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:16,703 INFO L93 Difference]: Finished difference Result 635 states and 861 transitions. [2023-11-22 23:17:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 23:17:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-11-22 23:17:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:16,705 INFO L225 Difference]: With dead ends: 635 [2023-11-22 23:17:16,706 INFO L226 Difference]: Without dead ends: 535 [2023-11-22 23:17:16,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-22 23:17:16,706 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 26 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:16,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1601 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 23:17:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-11-22 23:17:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 525. [2023-11-22 23:17:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.351923076923077) internal successors, (703), 520 states have internal predecessors, (703), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 709 transitions. [2023-11-22 23:17:16,721 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 709 transitions. Word has length 167 [2023-11-22 23:17:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:16,722 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 709 transitions. [2023-11-22 23:17:16,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 709 transitions. [2023-11-22 23:17:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-22 23:17:16,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:16,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:16,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 23:17:16,937 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:16,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash -343265033, now seen corresponding path program 1 times [2023-11-22 23:17:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:16,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455677575] [2023-11-22 23:17:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:16,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:16,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:16,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950985121] [2023-11-22 23:17:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:16,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:16,973 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) [2023-11-22 23:17:16,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 23:17:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:17,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 23:17:17,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:17,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:17,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455677575] [2023-11-22 23:17:17,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:17,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950985121] [2023-11-22 23:17:17,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950985121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:17,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:17,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 23:17:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098533586] [2023-11-22 23:17:17,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:17,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 23:17:17,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 23:17:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 23:17:17,472 INFO L87 Difference]: Start difference. First operand 525 states and 709 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:17,604 INFO L93 Difference]: Finished difference Result 630 states and 851 transitions. [2023-11-22 23:17:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 23:17:17,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-22 23:17:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:17,607 INFO L225 Difference]: With dead ends: 630 [2023-11-22 23:17:17,607 INFO L226 Difference]: Without dead ends: 530 [2023-11-22 23:17:17,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 23:17:17,607 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 6 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:17,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1374 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 23:17:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-11-22 23:17:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2023-11-22 23:17:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.3511450381679388) internal successors, (708), 524 states have internal predecessors, (708), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 714 transitions. [2023-11-22 23:17:17,622 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 714 transitions. Word has length 168 [2023-11-22 23:17:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:17,622 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 714 transitions. [2023-11-22 23:17:17,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 714 transitions. [2023-11-22 23:17:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-22 23:17:17,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:17,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:17,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:17,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 23:17:17,838 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:17,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1715072331, now seen corresponding path program 1 times [2023-11-22 23:17:17,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:17,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869412108] [2023-11-22 23:17:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:17,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:17,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:17,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162577941] [2023-11-22 23:17:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:17,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:17,892 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) [2023-11-22 23:17:17,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 23:17:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:18,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 23:17:18,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:18,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:18,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869412108] [2023-11-22 23:17:18,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162577941] [2023-11-22 23:17:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162577941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:18,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:17:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090020855] [2023-11-22 23:17:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:18,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:17:18,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:17:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:17:18,497 INFO L87 Difference]: Start difference. First operand 529 states and 714 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:18,739 INFO L93 Difference]: Finished difference Result 638 states and 861 transitions. [2023-11-22 23:17:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 23:17:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-11-22 23:17:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:18,741 INFO L225 Difference]: With dead ends: 638 [2023-11-22 23:17:18,741 INFO L226 Difference]: Without dead ends: 534 [2023-11-22 23:17:18,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:17:18,742 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 12 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:18,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1967 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 23:17:18,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-22 23:17:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 533. [2023-11-22 23:17:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.3503787878787878) internal successors, (713), 528 states have internal predecessors, (713), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 719 transitions. [2023-11-22 23:17:18,784 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 719 transitions. Word has length 168 [2023-11-22 23:17:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:18,784 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 719 transitions. [2023-11-22 23:17:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 719 transitions. [2023-11-22 23:17:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-22 23:17:18,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:18,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:18,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:19,019 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,SelfDestructingSolverStorable15 [2023-11-22 23:17:19,019 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:19,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1912340807, now seen corresponding path program 1 times [2023-11-22 23:17:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365504611] [2023-11-22 23:17:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:19,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:19,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768078626] [2023-11-22 23:17:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:19,065 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) [2023-11-22 23:17:19,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 23:17:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:19,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 23:17:19,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:19,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:19,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:19,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365504611] [2023-11-22 23:17:19,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:19,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768078626] [2023-11-22 23:17:19,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768078626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:19,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:19,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:17:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508815964] [2023-11-22 23:17:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:19,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:17:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:17:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:17:19,602 INFO L87 Difference]: Start difference. First operand 533 states and 719 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:19,821 INFO L93 Difference]: Finished difference Result 646 states and 871 transitions. [2023-11-22 23:17:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 23:17:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2023-11-22 23:17:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:19,823 INFO L225 Difference]: With dead ends: 646 [2023-11-22 23:17:19,824 INFO L226 Difference]: Without dead ends: 538 [2023-11-22 23:17:19,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:17:19,824 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 11 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:19,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1972 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 23:17:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-22 23:17:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 533. [2023-11-22 23:17:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.3503787878787878) internal successors, (713), 528 states have internal predecessors, (713), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 719 transitions. [2023-11-22 23:17:19,839 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 719 transitions. Word has length 169 [2023-11-22 23:17:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:19,839 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 719 transitions. [2023-11-22 23:17:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 719 transitions. [2023-11-22 23:17:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-22 23:17:19,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:19,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:19,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:20,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:20,056 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:20,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 682435376, now seen corresponding path program 1 times [2023-11-22 23:17:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933515906] [2023-11-22 23:17:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:20,086 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:20,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075178455] [2023-11-22 23:17:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:20,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:20,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:20,088 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) [2023-11-22 23:17:20,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 23:17:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:20,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 23:17:20,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 23:17:20,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933515906] [2023-11-22 23:17:20,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075178455] [2023-11-22 23:17:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075178455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:20,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:20,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:17:20,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028418833] [2023-11-22 23:17:20,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:20,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:17:20,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:20,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:17:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:17:20,612 INFO L87 Difference]: Start difference. First operand 533 states and 719 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:20,832 INFO L93 Difference]: Finished difference Result 646 states and 871 transitions. [2023-11-22 23:17:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 23:17:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2023-11-22 23:17:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:20,834 INFO L225 Difference]: With dead ends: 646 [2023-11-22 23:17:20,834 INFO L226 Difference]: Without dead ends: 538 [2023-11-22 23:17:20,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-22 23:17:20,834 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 36 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:20,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1978 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 23:17:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-22 23:17:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2023-11-22 23:17:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 530 states have (on average 1.349056603773585) internal successors, (715), 530 states have internal predecessors, (715), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 23:17:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 721 transitions. [2023-11-22 23:17:20,848 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 721 transitions. Word has length 169 [2023-11-22 23:17:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:20,848 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 721 transitions. [2023-11-22 23:17:20,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 721 transitions. [2023-11-22 23:17:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-22 23:17:20,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:20,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:20,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 23:17:21,064 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:21,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -469356144, now seen corresponding path program 1 times [2023-11-22 23:17:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:21,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61583558] [2023-11-22 23:17:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:21,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:21,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:21,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136350884] [2023-11-22 23:17:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:21,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:21,097 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) [2023-11-22 23:17:21,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 23:17:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:21,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 23:17:21,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 23:17:21,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:21,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:21,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61583558] [2023-11-22 23:17:21,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:21,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136350884] [2023-11-22 23:17:21,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136350884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:21,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 23:17:21,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296625763] [2023-11-22 23:17:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:21,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 23:17:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 23:17:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:17:21,576 INFO L87 Difference]: Start difference. First operand 535 states and 721 transitions. Second operand has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:21,610 INFO L93 Difference]: Finished difference Result 903 states and 1213 transitions. [2023-11-22 23:17:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 23:17:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-11-22 23:17:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:21,615 INFO L225 Difference]: With dead ends: 903 [2023-11-22 23:17:21,615 INFO L226 Difference]: Without dead ends: 537 [2023-11-22 23:17:21,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-22 23:17:21,616 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:21,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1163 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:17:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-22 23:17:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2023-11-22 23:17:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 531 states have (on average 1.3502824858757063) internal successors, (717), 532 states have internal predecessors, (717), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 724 transitions. [2023-11-22 23:17:21,633 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 724 transitions. Word has length 170 [2023-11-22 23:17:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:21,633 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 724 transitions. [2023-11-22 23:17:21,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 724 transitions. [2023-11-22 23:17:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-22 23:17:21,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:21,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:21,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:21,850 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash -70850186, now seen corresponding path program 1 times [2023-11-22 23:17:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:21,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514738320] [2023-11-22 23:17:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:21,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:21,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:21,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702992222] [2023-11-22 23:17:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:21,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:21,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:21,886 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) [2023-11-22 23:17:21,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 23:17:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:22,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 23:17:22,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 23:17:22,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:22,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:22,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514738320] [2023-11-22 23:17:22,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:22,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702992222] [2023-11-22 23:17:22,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702992222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:22,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:22,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 23:17:22,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738025892] [2023-11-22 23:17:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 23:17:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 23:17:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:17:22,477 INFO L87 Difference]: Start difference. First operand 537 states and 724 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:22,550 INFO L93 Difference]: Finished difference Result 652 states and 876 transitions. [2023-11-22 23:17:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 23:17:22,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 172 [2023-11-22 23:17:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:22,552 INFO L225 Difference]: With dead ends: 652 [2023-11-22 23:17:22,552 INFO L226 Difference]: Without dead ends: 542 [2023-11-22 23:17:22,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 23:17:22,554 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 6 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:22,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1130 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 23:17:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-22 23:17:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 536. [2023-11-22 23:17:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.349056603773585) internal successors, (715), 531 states have internal predecessors, (715), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 722 transitions. [2023-11-22 23:17:22,574 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 722 transitions. Word has length 172 [2023-11-22 23:17:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:22,574 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 722 transitions. [2023-11-22 23:17:22,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 722 transitions. [2023-11-22 23:17:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-22 23:17:22,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:22,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:22,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-22 23:17:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:22,798 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:22,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1322466896, now seen corresponding path program 1 times [2023-11-22 23:17:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191371723] [2023-11-22 23:17:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:22,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:22,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508766046] [2023-11-22 23:17:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:22,865 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) [2023-11-22 23:17:22,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 23:17:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:23,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 23:17:23,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 23:17:29,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191371723] [2023-11-22 23:17:29,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508766046] [2023-11-22 23:17:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508766046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:29,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:29,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:17:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554246484] [2023-11-22 23:17:29,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:17:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:17:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:17:29,693 INFO L87 Difference]: Start difference. First operand 536 states and 722 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:31,225 INFO L93 Difference]: Finished difference Result 957 states and 1295 transitions. [2023-11-22 23:17:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 23:17:31,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 172 [2023-11-22 23:17:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:31,227 INFO L225 Difference]: With dead ends: 957 [2023-11-22 23:17:31,228 INFO L226 Difference]: Without dead ends: 556 [2023-11-22 23:17:31,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:17:31,230 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 16 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:31,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1702 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 23:17:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-22 23:17:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 536. [2023-11-22 23:17:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.349056603773585) internal successors, (715), 531 states have internal predecessors, (715), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 722 transitions. [2023-11-22 23:17:31,244 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 722 transitions. Word has length 172 [2023-11-22 23:17:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:31,245 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 722 transitions. [2023-11-22 23:17:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 722 transitions. [2023-11-22 23:17:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-22 23:17:31,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:31,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:31,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:31,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:31,462 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:31,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:31,463 INFO L85 PathProgramCache]: Analyzing trace with hash 74113178, now seen corresponding path program 1 times [2023-11-22 23:17:31,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:31,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776934750] [2023-11-22 23:17:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:31,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:31,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853743931] [2023-11-22 23:17:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:31,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:31,505 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) [2023-11-22 23:17:31,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 23:17:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:32,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 23:17:32,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 23:17:32,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776934750] [2023-11-22 23:17:32,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853743931] [2023-11-22 23:17:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853743931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:32,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:32,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 23:17:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642651870] [2023-11-22 23:17:32,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:32,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 23:17:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 23:17:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 23:17:32,185 INFO L87 Difference]: Start difference. First operand 536 states and 722 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:32,485 INFO L93 Difference]: Finished difference Result 955 states and 1291 transitions. [2023-11-22 23:17:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 23:17:32,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 173 [2023-11-22 23:17:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:32,487 INFO L225 Difference]: With dead ends: 955 [2023-11-22 23:17:32,487 INFO L226 Difference]: Without dead ends: 546 [2023-11-22 23:17:32,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 23:17:32,488 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 10 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:32,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1480 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 23:17:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-22 23:17:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2023-11-22 23:17:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.3475836431226766) internal successors, (725), 539 states have internal predecessors, (725), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 732 transitions. [2023-11-22 23:17:32,503 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 732 transitions. Word has length 173 [2023-11-22 23:17:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:32,503 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 732 transitions. [2023-11-22 23:17:32,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 732 transitions. [2023-11-22 23:17:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-22 23:17:32,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:32,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:32,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:32,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:32,720 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:32,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash 678383141, now seen corresponding path program 1 times [2023-11-22 23:17:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:32,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022870897] [2023-11-22 23:17:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:32,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:32,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:32,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128017485] [2023-11-22 23:17:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:32,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:32,755 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) [2023-11-22 23:17:32,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 23:17:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:33,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 23:17:33,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 23:17:33,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:33,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022870897] [2023-11-22 23:17:33,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128017485] [2023-11-22 23:17:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128017485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:33,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:33,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:17:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938570278] [2023-11-22 23:17:33,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:33,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:17:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:17:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:17:33,367 INFO L87 Difference]: Start difference. First operand 544 states and 732 transitions. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:33,780 INFO L93 Difference]: Finished difference Result 965 states and 1304 transitions. [2023-11-22 23:17:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 23:17:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 173 [2023-11-22 23:17:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:33,783 INFO L225 Difference]: With dead ends: 965 [2023-11-22 23:17:33,783 INFO L226 Difference]: Without dead ends: 560 [2023-11-22 23:17:33,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:17:33,784 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 15 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:33,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1708 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 23:17:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-11-22 23:17:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 546. [2023-11-22 23:17:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 540 states have (on average 1.35) internal successors, (729), 541 states have internal predecessors, (729), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 736 transitions. [2023-11-22 23:17:33,825 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 736 transitions. Word has length 173 [2023-11-22 23:17:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:33,825 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 736 transitions. [2023-11-22 23:17:33,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 736 transitions. [2023-11-22 23:17:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-22 23:17:33,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:33,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:33,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:34,040 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,SelfDestructingSolverStorable22 [2023-11-22 23:17:34,040 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:34,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash 143761052, now seen corresponding path program 1 times [2023-11-22 23:17:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:34,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683455641] [2023-11-22 23:17:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:34,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:34,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:34,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586958665] [2023-11-22 23:17:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:34,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:34,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:34,093 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) [2023-11-22 23:17:34,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 23:17:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:34,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 23:17:34,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 23:17:34,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:34,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683455641] [2023-11-22 23:17:34,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586958665] [2023-11-22 23:17:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586958665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:34,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:34,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 23:17:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820265435] [2023-11-22 23:17:34,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 23:17:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 23:17:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:17:34,799 INFO L87 Difference]: Start difference. First operand 546 states and 736 transitions. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:35,187 INFO L93 Difference]: Finished difference Result 972 states and 1311 transitions. [2023-11-22 23:17:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 23:17:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 173 [2023-11-22 23:17:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:35,189 INFO L225 Difference]: With dead ends: 972 [2023-11-22 23:17:35,189 INFO L226 Difference]: Without dead ends: 570 [2023-11-22 23:17:35,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-22 23:17:35,190 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 43 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:35,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1809 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 23:17:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-22 23:17:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2023-11-22 23:17:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 550 states have (on average 1.3472727272727272) internal successors, (741), 551 states have internal predecessors, (741), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 748 transitions. [2023-11-22 23:17:35,227 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 748 transitions. Word has length 173 [2023-11-22 23:17:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:35,240 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 748 transitions. [2023-11-22 23:17:35,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 748 transitions. [2023-11-22 23:17:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-22 23:17:35,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:35,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:35,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:35,461 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,SelfDestructingSolverStorable23 [2023-11-22 23:17:35,461 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:35,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2040570055, now seen corresponding path program 1 times [2023-11-22 23:17:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:35,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825164345] [2023-11-22 23:17:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:35,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:35,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134643190] [2023-11-22 23:17:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:35,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:35,510 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) [2023-11-22 23:17:35,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 23:17:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:36,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 23:17:36,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-22 23:17:36,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:17:36,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825164345] [2023-11-22 23:17:36,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134643190] [2023-11-22 23:17:36,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134643190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:17:36,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:17:36,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-22 23:17:36,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106999410] [2023-11-22 23:17:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:17:36,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 23:17:36,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 23:17:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-22 23:17:36,188 INFO L87 Difference]: Start difference. First operand 556 states and 748 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:36,624 INFO L93 Difference]: Finished difference Result 994 states and 1342 transitions. [2023-11-22 23:17:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 23:17:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 174 [2023-11-22 23:17:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:36,626 INFO L225 Difference]: With dead ends: 994 [2023-11-22 23:17:36,626 INFO L226 Difference]: Without dead ends: 578 [2023-11-22 23:17:36,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-22 23:17:36,627 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 20 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:36,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2366 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 23:17:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-22 23:17:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 568. [2023-11-22 23:17:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.3434163701067616) internal successors, (755), 563 states have internal predecessors, (755), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 762 transitions. [2023-11-22 23:17:36,641 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 762 transitions. Word has length 174 [2023-11-22 23:17:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:36,641 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 762 transitions. [2023-11-22 23:17:36,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:17:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 762 transitions. [2023-11-22 23:17:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-22 23:17:36,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:36,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:36,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:36,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:36,857 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:36,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1761610469, now seen corresponding path program 1 times [2023-11-22 23:17:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127054071] [2023-11-22 23:17:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:36,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:36,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828626545] [2023-11-22 23:17:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:36,909 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) [2023-11-22 23:17:36,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 23:17:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:17:38,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-22 23:17:38,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:17:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 23:17:38,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 23:17:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 23:17:38,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:17:38,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127054071] [2023-11-22 23:17:38,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:17:38,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828626545] [2023-11-22 23:17:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828626545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 23:17:38,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 23:17:38,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-22 23:17:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543869346] [2023-11-22 23:17:38,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 23:17:38,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 23:17:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:17:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 23:17:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:17:38,131 INFO L87 Difference]: Start difference. First operand 568 states and 762 transitions. Second operand has 8 states, 6 states have (on average 29.333333333333332) internal successors, (176), 8 states have internal predecessors, (176), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 23:17:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:17:38,236 INFO L93 Difference]: Finished difference Result 960 states and 1287 transitions. [2023-11-22 23:17:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 23:17:38,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 29.333333333333332) internal successors, (176), 8 states have internal predecessors, (176), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 174 [2023-11-22 23:17:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:17:38,252 INFO L225 Difference]: With dead ends: 960 [2023-11-22 23:17:38,268 INFO L226 Difference]: Without dead ends: 577 [2023-11-22 23:17:38,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2023-11-22 23:17:38,272 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 7 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 23:17:38,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1549 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 23:17:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-22 23:17:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 576. [2023-11-22 23:17:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 569 states have (on average 1.3497363796133568) internal successors, (768), 570 states have internal predecessors, (768), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:17:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 775 transitions. [2023-11-22 23:17:38,292 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 775 transitions. Word has length 174 [2023-11-22 23:17:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:17:38,292 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 775 transitions. [2023-11-22 23:17:38,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 29.333333333333332) internal successors, (176), 8 states have internal predecessors, (176), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 23:17:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 775 transitions. [2023-11-22 23:17:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-22 23:17:38,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:17:38,295 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:17:38,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-22 23:17:38,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:38,508 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:17:38,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:17:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1729779329, now seen corresponding path program 2 times [2023-11-22 23:17:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:17:38,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188572842] [2023-11-22 23:17:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:17:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:17:38,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:17:38,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137459060] [2023-11-22 23:17:38,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 23:17:38,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:17:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:17:38,546 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) [2023-11-22 23:17:38,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 23:17:39,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 23:17:39,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 23:17:39,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-22 23:17:39,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:18:44,389 WARN L293 SmtUtils]: Spent 22.44s on a formula simplification. DAG size of input: 53 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-22 23:18:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-22 23:18:44,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:18:44,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:18:44,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188572842] [2023-11-22 23:18:44,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:18:44,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137459060] [2023-11-22 23:18:44,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137459060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:18:44,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:18:44,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-22 23:18:44,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500522903] [2023-11-22 23:18:44,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:18:44,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 23:18:44,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:18:44,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 23:18:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=129, Unknown=2, NotChecked=0, Total=156 [2023-11-22 23:18:44,415 INFO L87 Difference]: Start difference. First operand 576 states and 775 transitions. Second operand has 13 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:18:50,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-22 23:18:52,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:18:54,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:18:56,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:18:58,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:19:00,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:19:02,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:19:04,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:19:06,051 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_z_57 Int)) (and (exists ((v_y_57 Int) (v_y_55 Int)) (and (= (+ (* v_y_57 4294967296) (* 2 (mod (+ (* 2147483647 |c_ULTIMATE.start_main_~_hf_hashv~0#1|) 1069182907) 2147483648)) (* v_z_57 4294705145)) 4294967296) (= 554194920824 (+ (* 65536 (mod (+ (* v_z_57 2) 1) 4294967296)) (* v_y_57 37270021242995343360) (* v_y_55 12884901888) (* v_z_57 37267746400682115331) |c_ULTIMATE.start_main_~_hf_hashv~0#1|)))) (<= v_z_57 4294967295))) (= (* (mod |c_ULTIMATE.start_main_~_hj_i~1#1| 4294967296) 256) |c_ULTIMATE.start_main_~_hj_j~1#1|) (= (+ |c_ULTIMATE.start_main_#t~nondet202#1| |c_ULTIMATE.start_main_~_hj_i~1#1| |c_ULTIMATE.start_main_~_hj_j~1#1|) 4276993779) (= (+ |c_ULTIMATE.start_main_~_hj_i~1#1| |c_ULTIMATE.start_main_~_hj_j~1#1| |c_ULTIMATE.start_main_~_hf_hashv~0#1|) 4276993779)) is different from false [2023-11-22 23:19:08,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-22 23:19:09,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-22 23:19:11,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-22 23:19:13,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-22 23:19:15,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-22 23:19:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:19:16,584 INFO L93 Difference]: Finished difference Result 703 states and 945 transitions. [2023-11-22 23:19:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 23:19:16,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 178 [2023-11-22 23:19:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:19:16,587 INFO L225 Difference]: With dead ends: 703 [2023-11-22 23:19:16,588 INFO L226 Difference]: Without dead ends: 594 [2023-11-22 23:19:16,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=39, Invalid=202, Unknown=3, NotChecked=28, Total=272 [2023-11-22 23:19:16,588 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 22 mSDsluCounter, 2892 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 5 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2023-11-22 23:19:16,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3257 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 690 Invalid, 7 Unknown, 24 Unchecked, 27.6s Time] [2023-11-22 23:19:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-22 23:19:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 588. [2023-11-22 23:19:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 581 states have (on average 1.3476764199655766) internal successors, (783), 582 states have internal predecessors, (783), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:19:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 790 transitions. [2023-11-22 23:19:16,610 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 790 transitions. Word has length 178 [2023-11-22 23:19:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:19:16,610 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 790 transitions. [2023-11-22 23:19:16,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:19:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 790 transitions. [2023-11-22 23:19:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-22 23:19:16,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:19:16,612 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:19:16,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-22 23:19:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-22 23:19:16,820 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:19:16,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:19:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1545843613, now seen corresponding path program 1 times [2023-11-22 23:19:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:19:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254442159] [2023-11-22 23:19:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:19:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:19:16,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:19:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34580725] [2023-11-22 23:19:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:19:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:19:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:19:16,861 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) [2023-11-22 23:19:16,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 23:19:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:19:17,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 151 conjunts are in the unsatisfiable core [2023-11-22 23:19:17,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:19:17,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2023-11-22 23:19:17,813 INFO L378 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 [2023-11-22 23:19:17,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 23:19:17,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-11-22 23:19:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 23:19:17,892 INFO L378 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 11 [2023-11-22 23:19:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 23:19:18,729 INFO L378 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 11 [2023-11-22 23:19:18,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 23:19:18,747 INFO L378 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 11 [2023-11-22 23:19:18,760 INFO L378 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 [2023-11-22 23:19:18,766 INFO L378 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 1 [2023-11-22 23:19:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 23:19:18,773 INFO L378 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 11 [2023-11-22 23:19:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 23:19:18,804 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2023-11-22 23:19:18,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 45 [2023-11-22 23:19:18,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 [2023-11-22 23:19:18,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-22 23:19:18,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-22 23:19:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 23:19:19,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 23:19:19,579 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6918 (Array Int Int))) (< (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~_ha_head~0#1.base| v_ArrVal_6918) |c_ULTIMATE.start_main_~#i~0#1.base|) |c_ULTIMATE.start_main_~#i~0#1.offset|) 1) 4294967296) (mod |c_ULTIMATE.start_main_~bound~0#1| 4294967296))) is different from false [2023-11-22 23:19:19,739 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6918 (Array Int Int)) (v_ArrVal_6913 (Array Int Int)) (v_ArrVal_6912 (Array Int Int)) (v_ArrVal_6914 (Array Int Int)) (|v_ULTIMATE.start_main_~_ha_head~0#1.base_14| Int) (v_ArrVal_6916 (Array Int Int))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~users~0#1.offset| 8))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~users~0#1.base|) .cse2))) (or (not (= v_ArrVal_6912 (let ((.cse1 (+ 12 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~users~0#1.base|) .cse2)))) (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 (select v_ArrVal_6912 .cse1))))) (< (mod (+ (select (select (store (store (store |c_#memory_int| .cse0 v_ArrVal_6913) |c_ULTIMATE.start_main_~user~0#1.base| v_ArrVal_6916) |v_ULTIMATE.start_main_~_ha_head~0#1.base_14| v_ArrVal_6918) |c_ULTIMATE.start_main_~#i~0#1.base|) |c_ULTIMATE.start_main_~#i~0#1.offset|) 1) 4294967296) (mod |c_ULTIMATE.start_main_~bound~0#1| 4294967296)) (< (select (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_6912))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~users~0#1.base|) .cse2))) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_6914) |c_ULTIMATE.start_main_~users~0#1.base|) .cse2)) |v_ULTIMATE.start_main_~_ha_head~0#1.base_14|))))) is different from false [2023-11-22 23:19:19,776 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6918 (Array Int Int)) (v_ArrVal_6913 (Array Int Int)) (v_ArrVal_6912 (Array Int Int)) (v_ArrVal_6914 (Array Int Int)) (|v_ULTIMATE.start_main_~_ha_head~0#1.base_14| Int) (v_ArrVal_6916 (Array Int Int))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~user~0#1.offset| 8))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (or (< (mod (+ (select (select (store (store (store |c_#memory_int| .cse0 v_ArrVal_6913) |c_ULTIMATE.start_main_~user~0#1.base| v_ArrVal_6916) |v_ULTIMATE.start_main_~_ha_head~0#1.base_14| v_ArrVal_6918) |c_ULTIMATE.start_main_~#i~0#1.base|) |c_ULTIMATE.start_main_~#i~0#1.offset|) 1) 4294967296) (mod |c_ULTIMATE.start_main_~bound~0#1| 4294967296)) (< (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_6912))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_6914) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)) |v_ULTIMATE.start_main_~_ha_head~0#1.base_14|) (not (= v_ArrVal_6912 (let ((.cse3 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) 12))) (store (select |c_#memory_$Pointer$.base| .cse0) .cse3 (select v_ArrVal_6912 .cse3))))))))) is different from false [2023-11-22 23:19:19,900 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6918 (Array Int Int)) (v_ArrVal_6931 (Array Int Int)) (v_ArrVal_6930 (Array Int Int)) (v_ArrVal_6932 (Array Int Int)) (v_ArrVal_6913 (Array Int Int)) (v_ArrVal_6912 (Array Int Int)) (v_ArrVal_6914 (Array Int Int)) (|v_ULTIMATE.start_main_~_ha_head~0#1.base_14| Int) (v_ArrVal_6916 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem69#1.base| v_ArrVal_6932)) (.cse4 (+ |c_ULTIMATE.start_main_~user~0#1.offset| 8))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem69#1.base| v_ArrVal_6930)) (.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse4))) (or (not (= v_ArrVal_6912 (let ((.cse2 (+ (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse4) 12))) (store (select .cse0 .cse1) .cse2 (select v_ArrVal_6912 .cse2))))) (< (mod (+ (select (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem69#1.base| v_ArrVal_6931) .cse1 v_ArrVal_6913) |c_ULTIMATE.start_main_~user~0#1.base| v_ArrVal_6916) |v_ULTIMATE.start_main_~_ha_head~0#1.base_14| v_ArrVal_6918) |c_ULTIMATE.start_main_~#i~0#1.base|) |c_ULTIMATE.start_main_~#i~0#1.offset|) 1) 4294967296) (mod |c_ULTIMATE.start_main_~bound~0#1| 4294967296)) (< (select (let ((.cse5 (store .cse0 .cse1 v_ArrVal_6912))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~user~0#1.base|) .cse4))) (select (select (store .cse3 .cse1 v_ArrVal_6914) |c_ULTIMATE.start_main_~user~0#1.base|) .cse4)) |v_ULTIMATE.start_main_~_ha_head~0#1.base_14|))))) is different from false [2023-11-22 23:19:19,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:19:19,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254442159] [2023-11-22 23:19:19,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:19:19,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34580725] [2023-11-22 23:19:19,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34580725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 23:19:19,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-22 23:19:19,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-22 23:19:19,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594182169] [2023-11-22 23:19:19,904 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-22 23:19:19,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 23:19:19,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:19:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 23:19:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=282, Unknown=15, NotChecked=148, Total=506 [2023-11-22 23:19:19,905 INFO L87 Difference]: Start difference. First operand 588 states and 790 transitions. Second operand has 15 states, 13 states have (on average 13.307692307692308) internal successors, (173), 13 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 23:19:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:19:22,176 INFO L93 Difference]: Finished difference Result 1505 states and 2022 transitions. [2023-11-22 23:19:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 23:19:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 13.307692307692308) internal successors, (173), 13 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 178 [2023-11-22 23:19:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:19:22,181 INFO L225 Difference]: With dead ends: 1505 [2023-11-22 23:19:22,181 INFO L226 Difference]: Without dead ends: 982 [2023-11-22 23:19:22,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=16, NotChecked=164, Total=600 [2023-11-22 23:19:22,182 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 640 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-22 23:19:22,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 3658 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-22 23:19:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2023-11-22 23:19:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 513. [2023-11-22 23:19:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 506 states have (on average 1.316205533596838) internal successors, (666), 507 states have internal predecessors, (666), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:19:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 673 transitions. [2023-11-22 23:19:22,202 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 673 transitions. Word has length 178 [2023-11-22 23:19:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:19:22,202 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 673 transitions. [2023-11-22 23:19:22,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 13.307692307692308) internal successors, (173), 13 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 23:19:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 673 transitions. [2023-11-22 23:19:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-22 23:19:22,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:19:22,203 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:19:22,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-22 23:19:22,418 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,SelfDestructingSolverStorable27 [2023-11-22 23:19:22,418 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:19:22,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:19:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1785604913, now seen corresponding path program 2 times [2023-11-22 23:19:22,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:19:22,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398415663] [2023-11-22 23:19:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:19:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:19:22,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:19:22,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858122632] [2023-11-22 23:19:22,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 23:19:22,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:19:22,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:19:22,457 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) [2023-11-22 23:19:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 23:19:23,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 23:19:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 23:19:23,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 23:19:23,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:20:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 23:20:19,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:20:19,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:20:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398415663] [2023-11-22 23:20:19,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:20:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858122632] [2023-11-22 23:20:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858122632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:20:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:20:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-22 23:20:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111669684] [2023-11-22 23:20:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:20:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 23:20:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:20:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 23:20:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-22 23:20:19,725 INFO L87 Difference]: Start difference. First operand 513 states and 673 transitions. Second operand has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:20:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:20:20,133 INFO L93 Difference]: Finished difference Result 637 states and 839 transitions. [2023-11-22 23:20:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 23:20:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 179 [2023-11-22 23:20:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:20:20,135 INFO L225 Difference]: With dead ends: 637 [2023-11-22 23:20:20,135 INFO L226 Difference]: Without dead ends: 515 [2023-11-22 23:20:20,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-22 23:20:20,136 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 19 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 23:20:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2671 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 23:20:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-22 23:20:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 509. [2023-11-22 23:20:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 502 states have (on average 1.3147410358565736) internal successors, (660), 503 states have internal predecessors, (660), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:20:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 667 transitions. [2023-11-22 23:20:20,154 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 667 transitions. Word has length 179 [2023-11-22 23:20:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:20:20,155 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 667 transitions. [2023-11-22 23:20:20,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:20:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 667 transitions. [2023-11-22 23:20:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-22 23:20:20,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:20:20,157 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:20:20,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 23:20:20,364 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,SelfDestructingSolverStorable28 [2023-11-22 23:20:20,364 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:20:20,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:20:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 559581873, now seen corresponding path program 1 times [2023-11-22 23:20:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:20:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301752670] [2023-11-22 23:20:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:20:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:20:20,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:20:20,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14096565] [2023-11-22 23:20:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:20:20,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:20:20,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:20:20,403 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) [2023-11-22 23:20:20,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 23:20:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:20:21,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 23:20:21,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:20:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 23:20:21,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:20:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:20:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301752670] [2023-11-22 23:20:21,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:20:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14096565] [2023-11-22 23:20:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14096565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:20:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:20:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 23:20:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468188138] [2023-11-22 23:20:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:20:21,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 23:20:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:20:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 23:20:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 23:20:21,682 INFO L87 Difference]: Start difference. First operand 509 states and 667 transitions. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:20:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:20:21,979 INFO L93 Difference]: Finished difference Result 632 states and 829 transitions. [2023-11-22 23:20:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 23:20:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 179 [2023-11-22 23:20:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:20:21,981 INFO L225 Difference]: With dead ends: 632 [2023-11-22 23:20:21,981 INFO L226 Difference]: Without dead ends: 515 [2023-11-22 23:20:21,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 23:20:21,981 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 10 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 23:20:21,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1972 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 23:20:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-22 23:20:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 509. [2023-11-22 23:20:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 502 states have (on average 1.3147410358565736) internal successors, (660), 503 states have internal predecessors, (660), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:20:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 667 transitions. [2023-11-22 23:20:21,998 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 667 transitions. Word has length 179 [2023-11-22 23:20:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:20:21,998 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 667 transitions. [2023-11-22 23:20:21,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:20:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 667 transitions. [2023-11-22 23:20:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-22 23:20:21,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:20:22,000 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:20:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 23:20:22,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:20:22,213 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:20:22,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:20:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash -469777425, now seen corresponding path program 1 times [2023-11-22 23:20:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:20:22,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950873229] [2023-11-22 23:20:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:20:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:20:22,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:20:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044130653] [2023-11-22 23:20:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:20:22,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:20:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:20:22,252 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) [2023-11-22 23:20:22,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 23:20:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:20:23,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 23:20:23,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:20:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-22 23:20:32,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 23:20:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 23:20:32,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950873229] [2023-11-22 23:20:32,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-22 23:20:32,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044130653] [2023-11-22 23:20:32,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044130653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 23:20:32,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 23:20:32,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-22 23:20:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438563708] [2023-11-22 23:20:32,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 23:20:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 23:20:32,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 23:20:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 23:20:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-22 23:20:32,677 INFO L87 Difference]: Start difference. First operand 509 states and 667 transitions. Second operand has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:20:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 23:20:34,194 INFO L93 Difference]: Finished difference Result 945 states and 1249 transitions. [2023-11-22 23:20:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 23:20:34,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 179 [2023-11-22 23:20:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 23:20:34,196 INFO L225 Difference]: With dead ends: 945 [2023-11-22 23:20:34,196 INFO L226 Difference]: Without dead ends: 511 [2023-11-22 23:20:34,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-22 23:20:34,197 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 14 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 23:20:34,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2734 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 23:20:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2023-11-22 23:20:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 505. [2023-11-22 23:20:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 498 states have (on average 1.3132530120481927) internal successors, (654), 499 states have internal predecessors, (654), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-22 23:20:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 661 transitions. [2023-11-22 23:20:34,214 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 661 transitions. Word has length 179 [2023-11-22 23:20:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 23:20:34,214 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 661 transitions. [2023-11-22 23:20:34,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-22 23:20:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 661 transitions. [2023-11-22 23:20:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-22 23:20:34,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 23:20:34,216 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 23:20:34,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 23:20:34,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:20:34,428 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 23:20:34,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 23:20:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1372520331, now seen corresponding path program 1 times [2023-11-22 23:20:34,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 23:20:34,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989972999] [2023-11-22 23:20:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:20:34,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 23:20:34,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-22 23:20:34,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154901094] [2023-11-22 23:20:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 23:20:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 23:20:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 23:20:34,476 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) [2023-11-22 23:20:34,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 23:20:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 23:20:35,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 141 conjunts are in the unsatisfiable core [2023-11-22 23:20:35,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 23:20:35,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2023-11-22 23:20:35,901 INFO L349 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-11-22 23:20:35,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-11-22 23:20:35,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-22 23:20:35,928 INFO L378 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 11 treesize of output 7 [2023-11-22 23:20:35,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 27 treesize of output 15 [2023-11-22 23:20:36,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-22 23:20:36,237 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-22 23:20:36,240 INFO L378 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-11-22 23:20:36,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-22 23:20:46,458 INFO L224 Elim1Store]: Index analysis took 206 ms Killed by 15