./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-tiling/mbpr3.c --full-output --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/array-tiling/mbpr3.c -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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:52:21,191 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:52:21,268 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:52:21,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:52:21,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:52:21,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:52:21,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:52:21,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:52:21,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:52:21,298 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:52:21,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:52:21,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:52:21,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:52:21,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:52:21,300 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:52:21,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:52:21,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:52:21,301 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:52:21,301 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:52:21,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:52:21,301 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:52:21,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:52:21,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:52:21,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:52:21,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:52:21,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:52:21,302 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:52:21,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:52:21,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:52:21,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:52:21,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:52:21,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:52:21,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:52:21,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:52:21,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:52:21,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:52:21,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:52:21,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:52:21,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:52:21,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:52:21,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:52:21,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:52:21,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2023-11-22 18:52:21,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:52:21,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:52:21,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:52:21,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:52:21,574 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:52:21,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2023-11-22 18:52:22,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:52:22,683 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:52:22,683 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c [2023-11-22 18:52:22,689 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921288318/9f66d6523dd241adbb8618d6cae0b3a4/FLAGf82b6710c [2023-11-22 18:52:22,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921288318/9f66d6523dd241adbb8618d6cae0b3a4 [2023-11-22 18:52:22,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:52:22,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:52:22,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:52:22,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:52:22,707 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:52:22,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:22,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7c3f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22, skipping insertion in model container [2023-11-22 18:52:22,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:22,729 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:52:22,887 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c[396,409] [2023-11-22 18:52:22,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:52:22,934 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:52:22,945 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr3.c[396,409] [2023-11-22 18:52:22,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:52:22,978 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:52:22,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22 WrapperNode [2023-11-22 18:52:22,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:52:22,980 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:52:22,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:52:22,981 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:52:22,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,031 INFO L138 Inliner]: procedures = 15, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 116 [2023-11-22 18:52:23,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:52:23,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:52:23,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:52:23,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:52:23,040 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,044 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,061 INFO L189 HeapSplitter]: Split 30 memory accesses to 3 slices as follows [2, 8, 20] [2023-11-22 18:52:23,061 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:52:23,089 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:52:23,089 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:52:23,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:52:23,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (1/1) ... [2023-11-22 18:52:23,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:52:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:23,114 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 18:52:23,120 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 18:52:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:52:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:52:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:52:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:52:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:52:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:52:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:52:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:52:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:52:23,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:52:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:52:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:52:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:52:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:52:23,213 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:52:23,215 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:52:23,504 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:52:23,526 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:52:23,527 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-22 18:52:23,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:52:23 BoogieIcfgContainer [2023-11-22 18:52:23,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:52:23,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:52:23,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:52:23,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:52:23,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:52:22" (1/3) ... [2023-11-22 18:52:23,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50050bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:52:23, skipping insertion in model container [2023-11-22 18:52:23,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:52:22" (2/3) ... [2023-11-22 18:52:23,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50050bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:52:23, skipping insertion in model container [2023-11-22 18:52:23,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:52:23" (3/3) ... [2023-11-22 18:52:23,533 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2023-11-22 18:52:23,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:52:23,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:52:23,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:52:23,595 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;@75cab4a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:52:23,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:52:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 18:52:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:52:23,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:23,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:23,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:23,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 139679752, now seen corresponding path program 1 times [2023-11-22 18:52:23,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:23,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454791101] [2023-11-22 18:52:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:23,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454791101] [2023-11-22 18:52:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454791101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:23,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:52:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594980915] [2023-11-22 18:52:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 18:52:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 18:52:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 18:52:23,822 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 18:52:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:23,855 INFO L93 Difference]: Finished difference Result 52 states and 79 transitions. [2023-11-22 18:52:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 18:52:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-22 18:52:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:23,862 INFO L225 Difference]: With dead ends: 52 [2023-11-22 18:52:23,862 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 18:52:23,864 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 18:52:23,867 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:23,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 18:52:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 18:52:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 18:52:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-22 18:52:23,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2023-11-22 18:52:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:23,893 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-22 18:52:23,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 18:52:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-22 18:52:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:52:23,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:23,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:23,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:52:23,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:23,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -834490832, now seen corresponding path program 1 times [2023-11-22 18:52:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:23,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323561170] [2023-11-22 18:52:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:24,039 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 18:52:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:24,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323561170] [2023-11-22 18:52:24,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323561170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:24,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:24,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:52:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993724648] [2023-11-22 18:52:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:52:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:52:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:52:24,047 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 18:52:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:24,088 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-22 18:52:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:52:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-22 18:52:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:24,091 INFO L225 Difference]: With dead ends: 29 [2023-11-22 18:52:24,091 INFO L226 Difference]: Without dead ends: 27 [2023-11-22 18:52:24,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 18:52:24,093 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:24,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-22 18:52:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-22 18:52:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:52:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-22 18:52:24,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-11-22 18:52:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:24,101 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-22 18:52:24,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 18:52:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-22 18:52:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-22 18:52:24,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:24,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:52:24,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:24,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:24,106 INFO L85 PathProgramCache]: Analyzing trace with hash -834431250, now seen corresponding path program 1 times [2023-11-22 18:52:24,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:24,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897609343] [2023-11-22 18:52:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:24,352 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 18:52:24,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897609343] [2023-11-22 18:52:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897609343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:24,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:24,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 18:52:24,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780975156] [2023-11-22 18:52:24,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:24,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:52:24,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:52:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:52:24,355 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 18:52:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:24,404 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-11-22 18:52:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:52:24,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-22 18:52:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:24,405 INFO L225 Difference]: With dead ends: 53 [2023-11-22 18:52:24,405 INFO L226 Difference]: Without dead ends: 35 [2023-11-22 18:52:24,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:52:24,406 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:24,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-22 18:52:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2023-11-22 18:52:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:52:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-22 18:52:24,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2023-11-22 18:52:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:24,412 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-22 18:52:24,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 18:52:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-22 18:52:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:52:24,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:24,413 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] [2023-11-22 18:52:24,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:52:24,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:24,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1903088773, now seen corresponding path program 1 times [2023-11-22 18:52:24,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:24,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667139680] [2023-11-22 18:52:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:24,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667139680] [2023-11-22 18:52:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667139680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:52:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:52:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:52:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874251054] [2023-11-22 18:52:24,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:52:24,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:52:24,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:52:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:52:24,508 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:52:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:24,538 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-22 18:52:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:52:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2023-11-22 18:52:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:24,539 INFO L225 Difference]: With dead ends: 42 [2023-11-22 18:52:24,539 INFO L226 Difference]: Without dead ends: 29 [2023-11-22 18:52:24,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:52:24,540 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:24,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:52:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-22 18:52:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-22 18:52:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 18:52:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-22 18:52:24,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2023-11-22 18:52:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:24,546 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-22 18:52:24,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:52:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-22 18:52:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:52:24,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:24,547 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] [2023-11-22 18:52:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:52:24,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:24,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1223030403, now seen corresponding path program 1 times [2023-11-22 18:52:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:24,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489513629] [2023-11-22 18:52:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:25,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:25,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489513629] [2023-11-22 18:52:25,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489513629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460399228] [2023-11-22 18:52:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:25,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:25,267 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 18:52:25,292 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 18:52:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:25,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-22 18:52:25,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:25,454 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 18:52:25,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:52:25,545 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 23 treesize of output 11 [2023-11-22 18:52:25,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:25,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 18 [2023-11-22 18:52:25,604 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 23 treesize of output 11 [2023-11-22 18:52:25,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:25,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:52:25,653 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 15 treesize of output 7 [2023-11-22 18:52:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:25,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:25,806 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 17 treesize of output 15 [2023-11-22 18:52:25,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-22 18:52:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460399228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:25,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:25,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-22 18:52:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869044126] [2023-11-22 18:52:25,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-22 18:52:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-22 18:52:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-22 18:52:25,839 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:52:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:26,002 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-11-22 18:52:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 18:52:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 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 25 [2023-11-22 18:52:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:26,004 INFO L225 Difference]: With dead ends: 75 [2023-11-22 18:52:26,004 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 18:52:26,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:52:26,005 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 156 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:26,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 56 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 18:52:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2023-11-22 18:52:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:52:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-22 18:52:26,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 25 [2023-11-22 18:52:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-22 18:52:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:52:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-22 18:52:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 18:52:26,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:26,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:26,031 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 18:52:26,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:26,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:26,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -488556627, now seen corresponding path program 1 times [2023-11-22 18:52:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:26,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024105872] [2023-11-22 18:52:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:26,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:26,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:26,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024105872] [2023-11-22 18:52:26,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024105872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:26,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871513934] [2023-11-22 18:52:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:26,563 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 18:52:26,584 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 18:52:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:26,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 18:52:26,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:26,690 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 18:52:26,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:26,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:52:26,744 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 23 treesize of output 11 [2023-11-22 18:52:26,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:26,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:52:26,831 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 15 treesize of output 7 [2023-11-22 18:52:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:26,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:26,939 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 19 treesize of output 17 [2023-11-22 18:52:26,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-22 18:52:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871513934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:26,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:26,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-22 18:52:26,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756514711] [2023-11-22 18:52:26,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:26,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 18:52:26,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 18:52:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-22 18:52:26,976 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:52:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:27,151 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-11-22 18:52:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 18:52:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 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 30 [2023-11-22 18:52:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:27,152 INFO L225 Difference]: With dead ends: 66 [2023-11-22 18:52:27,152 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 18:52:27,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:52:27,153 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:27,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 68 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 18:52:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2023-11-22 18:52:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:52:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-22 18:52:27,158 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2023-11-22 18:52:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:27,159 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-22 18:52:27,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 18:52:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-22 18:52:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 18:52:27,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:27,160 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:27,173 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 18:52:27,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 18:52:27,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:27,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash -867211395, now seen corresponding path program 2 times [2023-11-22 18:52:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:27,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362274677] [2023-11-22 18:52:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:27,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:27,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362274677] [2023-11-22 18:52:27,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362274677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:27,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744265824] [2023-11-22 18:52:27,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:52:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:27,624 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 18:52:27,626 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 18:52:27,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:52:27,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:27,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-22 18:52:27,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:27,717 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 18:52:27,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:27,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:52:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:27,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:27,869 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 17 treesize of output 15 [2023-11-22 18:52:27,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-22 18:52:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744265824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:27,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2023-11-22 18:52:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635635662] [2023-11-22 18:52:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 18:52:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 18:52:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-22 18:52:27,886 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:52:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:28,082 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-22 18:52:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:52:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2023-11-22 18:52:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:28,086 INFO L225 Difference]: With dead ends: 59 [2023-11-22 18:52:28,086 INFO L226 Difference]: Without dead ends: 57 [2023-11-22 18:52:28,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:52:28,087 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:28,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-22 18:52:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-22 18:52:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 18:52:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-22 18:52:28,099 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 35 [2023-11-22 18:52:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:28,100 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-22 18:52:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:52:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-22 18:52:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-22 18:52:28,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:28,102 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 18:52:28,114 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 18:52:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:28,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:28,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 777427373, now seen corresponding path program 3 times [2023-11-22 18:52:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659993223] [2023-11-22 18:52:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:28,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659993223] [2023-11-22 18:52:28,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659993223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305579930] [2023-11-22 18:52:28,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:52:28,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:28,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:28,541 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 18:52:28,564 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 18:52:28,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 18:52:28,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:28,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 18:52:28,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:28,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:52:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305579930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:29,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:29,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-22 18:52:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193983637] [2023-11-22 18:52:29,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:29,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 18:52:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 18:52:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2023-11-22 18:52:29,049 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 18:52:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:29,278 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2023-11-22 18:52:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:52:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 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 40 [2023-11-22 18:52:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:29,280 INFO L225 Difference]: With dead ends: 113 [2023-11-22 18:52:29,280 INFO L226 Difference]: Without dead ends: 56 [2023-11-22 18:52:29,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 18:52:29,282 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:29,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 104 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-22 18:52:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-11-22 18:52:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:52:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-22 18:52:29,295 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2023-11-22 18:52:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:29,296 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-22 18:52:29,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 18:52:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-22 18:52:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 18:52:29,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:29,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:29,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-22 18:52:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:29,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:29,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 495494460, now seen corresponding path program 4 times [2023-11-22 18:52:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:29,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314543863] [2023-11-22 18:52:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:52:29,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:29,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314543863] [2023-11-22 18:52:29,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314543863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:29,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718382925] [2023-11-22 18:52:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:52:29,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:29,948 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 18:52:29,952 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 18:52:30,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:52:30,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:30,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:52:30,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:30,080 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 18:52:30,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:30,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:52:30,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:30,122 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 31 treesize of output 11 [2023-11-22 18:52:30,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:30,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 33 [2023-11-22 18:52:30,229 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 15 treesize of output 7 [2023-11-22 18:52:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:52:30,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:30,363 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 59 treesize of output 53 [2023-11-22 18:52:30,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-22 18:52:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:52:30,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718382925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:30,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:30,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 26 [2023-11-22 18:52:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098400226] [2023-11-22 18:52:30,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:52:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:52:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:52:30,427 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:52:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:30,611 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-22 18:52:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 18:52:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 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 49 [2023-11-22 18:52:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:30,612 INFO L225 Difference]: With dead ends: 64 [2023-11-22 18:52:30,612 INFO L226 Difference]: Without dead ends: 55 [2023-11-22 18:52:30,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2023-11-22 18:52:30,614 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:30,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 128 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-22 18:52:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2023-11-22 18:52:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:52:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-22 18:52:30,622 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2023-11-22 18:52:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:30,623 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-22 18:52:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:52:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-22 18:52:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 18:52:30,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:30,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:30,650 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 18:52:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:30,836 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:30,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1175552830, now seen corresponding path program 5 times [2023-11-22 18:52:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759455979] [2023-11-22 18:52:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:31,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759455979] [2023-11-22 18:52:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759455979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757664170] [2023-11-22 18:52:31,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:52:31,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:31,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:31,578 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 18:52:31,580 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 18:52:31,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-22 18:52:31,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:31,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-22 18:52:31,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:32,041 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 18:52:32,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:52:32,101 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 19 treesize of output 18 [2023-11-22 18:52:32,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2023-11-22 18:52:32,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-11-22 18:52:32,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 35 [2023-11-22 18:52:32,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2023-11-22 18:52:32,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 35 [2023-11-22 18:52:32,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2023-11-22 18:52:32,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2023-11-22 18:52:32,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:32,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 10 [2023-11-22 18:52:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:32,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:32,715 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 19 treesize of output 17 [2023-11-22 18:52:32,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-22 18:52:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:52:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757664170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:32,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 12] total 34 [2023-11-22 18:52:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484935089] [2023-11-22 18:52:32,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:32,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-22 18:52:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-22 18:52:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-11-22 18:52:32,782 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 18:52:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:34,186 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2023-11-22 18:52:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-22 18:52:34,187 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 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 49 [2023-11-22 18:52:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:34,188 INFO L225 Difference]: With dead ends: 213 [2023-11-22 18:52:34,188 INFO L226 Difference]: Without dead ends: 204 [2023-11-22 18:52:34,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=910, Invalid=4346, Unknown=0, NotChecked=0, Total=5256 [2023-11-22 18:52:34,190 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 887 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:34,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 183 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:52:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-22 18:52:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 84. [2023-11-22 18:52:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 18:52:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-11-22 18:52:34,198 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 49 [2023-11-22 18:52:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:34,198 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-11-22 18:52:34,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 18:52:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-11-22 18:52:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 18:52:34,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:34,199 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:34,208 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 18:52:34,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:34,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:34,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1363532885, now seen corresponding path program 6 times [2023-11-22 18:52:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:34,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542954564] [2023-11-22 18:52:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:34,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:52:34,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:34,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542954564] [2023-11-22 18:52:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542954564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423469515] [2023-11-22 18:52:34,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:52:34,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:34,565 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 18:52:34,584 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 18:52:34,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-22 18:52:34,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:34,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:52:34,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:52:34,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:52:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423469515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:34,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:34,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-22 18:52:34,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184355963] [2023-11-22 18:52:34,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:34,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:52:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:52:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:52:34,888 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:52:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:35,055 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2023-11-22 18:52:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:52:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 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 57 [2023-11-22 18:52:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:35,056 INFO L225 Difference]: With dead ends: 173 [2023-11-22 18:52:35,057 INFO L226 Difference]: Without dead ends: 135 [2023-11-22 18:52:35,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:52:35,058 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:35,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 47 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:52:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-22 18:52:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2023-11-22 18:52:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 18:52:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2023-11-22 18:52:35,067 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 57 [2023-11-22 18:52:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:35,068 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2023-11-22 18:52:35,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:52:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2023-11-22 18:52:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-22 18:52:35,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:35,068 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:35,082 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 18:52:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:35,280 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:35,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1418828802, now seen corresponding path program 7 times [2023-11-22 18:52:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402703238] [2023-11-22 18:52:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:52:35,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402703238] [2023-11-22 18:52:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402703238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769794235] [2023-11-22 18:52:35,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:52:35,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:35,682 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 18:52:35,708 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 18:52:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:35,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-22 18:52:35,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:35,843 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 18:52:35,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:35,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:52:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 18:52:36,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:36,223 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 17 treesize of output 15 [2023-11-22 18:52:36,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-22 18:52:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:52:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769794235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:36,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:36,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2023-11-22 18:52:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645292787] [2023-11-22 18:52:36,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-22 18:52:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-22 18:52:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-22 18:52:36,233 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:52:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:36,911 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2023-11-22 18:52:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-22 18:52:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 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 59 [2023-11-22 18:52:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:36,912 INFO L225 Difference]: With dead ends: 149 [2023-11-22 18:52:36,912 INFO L226 Difference]: Without dead ends: 147 [2023-11-22 18:52:36,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=2583, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:52:36,914 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:36,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 194 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:52:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-22 18:52:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2023-11-22 18:52:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.09009009009009) internal successors, (121), 111 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 18:52:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2023-11-22 18:52:36,926 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 59 [2023-11-22 18:52:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:36,926 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2023-11-22 18:52:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:52:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2023-11-22 18:52:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-22 18:52:36,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:36,927 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:36,955 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 18:52:37,141 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,SelfDestructingSolverStorable11 [2023-11-22 18:52:37,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:37,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1826539578, now seen corresponding path program 8 times [2023-11-22 18:52:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:37,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870175232] [2023-11-22 18:52:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 18:52:37,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:37,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870175232] [2023-11-22 18:52:37,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870175232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:37,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95586985] [2023-11-22 18:52:37,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:52:37,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:37,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:37,260 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 18:52:37,262 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 18:52:37,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:52:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:37,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 18:52:37,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 18:52:37,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 18:52:37,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95586985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:37,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:37,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-22 18:52:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879203617] [2023-11-22 18:52:37,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:37,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:52:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:52:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:52:37,569 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:52:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:37,783 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2023-11-22 18:52:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-22 18:52:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 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 60 [2023-11-22 18:52:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:37,784 INFO L225 Difference]: With dead ends: 203 [2023-11-22 18:52:37,784 INFO L226 Difference]: Without dead ends: 133 [2023-11-22 18:52:37,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:52:37,785 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:37,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 98 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:52:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-22 18:52:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2023-11-22 18:52:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 18:52:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2023-11-22 18:52:37,795 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 60 [2023-11-22 18:52:37,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:37,795 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2023-11-22 18:52:37,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:52:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2023-11-22 18:52:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-22 18:52:37,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:37,796 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:37,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-22 18:52:38,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 18:52:38,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:38,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:38,008 INFO L85 PathProgramCache]: Analyzing trace with hash -250933029, now seen corresponding path program 9 times [2023-11-22 18:52:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:38,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657522628] [2023-11-22 18:52:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 18:52:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657522628] [2023-11-22 18:52:38,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657522628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263937824] [2023-11-22 18:52:38,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:52:38,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:38,800 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 18:52:38,801 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 18:52:39,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 18:52:39,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:39,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-22 18:52:39,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:39,289 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 18:52:39,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:39,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:52:39,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,398 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 27 treesize of output 22 [2023-11-22 18:52:39,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:39,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 36 [2023-11-22 18:52:39,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:39,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 25 [2023-11-22 18:52:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:39,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 47 [2023-11-22 18:52:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:39,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 25 [2023-11-22 18:52:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,649 INFO L349 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2023-11-22 18:52:39,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 47 [2023-11-22 18:52:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:39,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 25 [2023-11-22 18:52:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:39,781 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-11-22 18:52:39,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 47 [2023-11-22 18:52:40,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:40,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:40,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-22 18:52:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:52:40,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:41,071 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 52 treesize of output 48 [2023-11-22 18:52:41,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-11-22 18:52:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:52:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263937824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:41,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:41,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 20] total 53 [2023-11-22 18:52:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664451848] [2023-11-22 18:52:41,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:41,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-22 18:52:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-22 18:52:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 18:52:41,286 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 18:52:46,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:52:49,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:52:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:50,173 INFO L93 Difference]: Finished difference Result 284 states and 312 transitions. [2023-11-22 18:52:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-22 18:52:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 states have internal predecessors, (169), 0 states have call successors, (0), 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 63 [2023-11-22 18:52:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:50,175 INFO L225 Difference]: With dead ends: 284 [2023-11-22 18:52:50,175 INFO L226 Difference]: Without dead ends: 231 [2023-11-22 18:52:50,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2333, Invalid=14437, Unknown=0, NotChecked=0, Total=16770 [2023-11-22 18:52:50,179 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 957 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 422 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:50,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 592 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 2540 Invalid, 4 Unknown, 0 Unchecked, 6.0s Time] [2023-11-22 18:52:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-22 18:52:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 111. [2023-11-22 18:52:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:52:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2023-11-22 18:52:50,191 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 63 [2023-11-22 18:52:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:50,192 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2023-11-22 18:52:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 53 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 18:52:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2023-11-22 18:52:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-22 18:52:50,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:50,192 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:50,205 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 18:52:50,393 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,SelfDestructingSolverStorable13 [2023-11-22 18:52:50,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:50,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -212449844, now seen corresponding path program 10 times [2023-11-22 18:52:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719310440] [2023-11-22 18:52:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:52:50,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719310440] [2023-11-22 18:52:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719310440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108979654] [2023-11-22 18:52:50,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:52:50,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:50,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:50,718 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 18:52:50,718 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 18:52:50,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:52:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:50,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-22 18:52:50,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:52:51,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 18:52:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108979654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:51,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:51,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2023-11-22 18:52:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087064862] [2023-11-22 18:52:51,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-22 18:52:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-22 18:52:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:52:51,477 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 18:52:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:52:51,798 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2023-11-22 18:52:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 18:52:51,798 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 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 64 [2023-11-22 18:52:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:52:51,799 INFO L225 Difference]: With dead ends: 161 [2023-11-22 18:52:51,799 INFO L226 Difference]: Without dead ends: 104 [2023-11-22 18:52:51,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 18:52:51,800 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 255 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:52:51,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 189 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:52:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-22 18:52:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2023-11-22 18:52:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:52:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2023-11-22 18:52:51,814 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 64 [2023-11-22 18:52:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:52:51,814 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2023-11-22 18:52:51,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 40 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 18:52:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2023-11-22 18:52:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 18:52:51,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:52:51,817 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:52:51,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-22 18:52:52,024 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,SelfDestructingSolverStorable14 [2023-11-22 18:52:52,025 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:52:52,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:52:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -102936229, now seen corresponding path program 11 times [2023-11-22 18:52:52,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:52:52,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746298712] [2023-11-22 18:52:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:52:52,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:52:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:52:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 18:52:52,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:52:52,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746298712] [2023-11-22 18:52:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746298712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:52:52,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568767248] [2023-11-22 18:52:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:52:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:52:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:52:52,614 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 18:52:52,640 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 18:52:54,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-22 18:52:54,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:52:54,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-22 18:52:54,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:52:54,527 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 18:52:54,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:52:54,591 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 19 treesize of output 18 [2023-11-22 18:52:54,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2023-11-22 18:52:54,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-22 18:52:54,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 38 [2023-11-22 18:52:54,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 35 [2023-11-22 18:52:54,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 45 [2023-11-22 18:52:54,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 38 [2023-11-22 18:52:54,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 45 [2023-11-22 18:52:54,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 38 [2023-11-22 18:52:54,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 45 [2023-11-22 18:52:54,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:54,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 38 [2023-11-22 18:52:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:52:55,031 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-11-22 18:52:55,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 68 treesize of output 60 [2023-11-22 18:52:55,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:52:55,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 13 [2023-11-22 18:52:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:52:55,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:52:58,111 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 19 treesize of output 17 [2023-11-22 18:52:58,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-22 18:52:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 110 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 18:52:58,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568767248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:52:58,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:52:58,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 17] total 50 [2023-11-22 18:52:58,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588401896] [2023-11-22 18:52:58,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:52:58,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-22 18:52:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:52:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-22 18:52:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2242, Unknown=0, NotChecked=0, Total=2450 [2023-11-22 18:52:58,223 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 50 states, 50 states have (on average 4.06) internal successors, (203), 50 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 18:53:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:01,562 INFO L93 Difference]: Finished difference Result 235 states and 262 transitions. [2023-11-22 18:53:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-22 18:53:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.06) internal successors, (203), 50 states have internal predecessors, (203), 0 states have call successors, (0), 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 73 [2023-11-22 18:53:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:01,564 INFO L225 Difference]: With dead ends: 235 [2023-11-22 18:53:01,564 INFO L226 Difference]: Without dead ends: 226 [2023-11-22 18:53:01,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1546, Invalid=11564, Unknown=0, NotChecked=0, Total=13110 [2023-11-22 18:53:01,567 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 624 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 2641 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:01,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 410 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2641 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-22 18:53:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-22 18:53:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 163. [2023-11-22 18:53:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0740740740740742) internal successors, (174), 162 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:53:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2023-11-22 18:53:01,587 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 73 [2023-11-22 18:53:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:01,587 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2023-11-22 18:53:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.06) internal successors, (203), 50 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 18:53:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2023-11-22 18:53:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-22 18:53:01,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:01,588 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:01,598 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 18:53:01,796 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,SelfDestructingSolverStorable15 [2023-11-22 18:53:01,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:01,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash -561138339, now seen corresponding path program 12 times [2023-11-22 18:53:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:01,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893655988] [2023-11-22 18:53:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:53:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893655988] [2023-11-22 18:53:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893655988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55703213] [2023-11-22 18:53:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:53:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:02,301 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 18:53:02,301 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 18:53:02,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-22 18:53:02,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:02,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-22 18:53:02,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:02,770 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 13 treesize of output 9 [2023-11-22 18:53:02,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:02,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 31 [2023-11-22 18:53:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:53:03,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:03,106 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 17 treesize of output 15 [2023-11-22 18:53:03,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-22 18:53:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:53:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55703213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:03,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2023-11-22 18:53:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701077468] [2023-11-22 18:53:03,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:03,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-22 18:53:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:03,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-22 18:53:03,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-11-22 18:53:03,116 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:53:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:04,217 INFO L93 Difference]: Finished difference Result 287 states and 308 transitions. [2023-11-22 18:53:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-22 18:53:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 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 83 [2023-11-22 18:53:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:04,218 INFO L225 Difference]: With dead ends: 287 [2023-11-22 18:53:04,218 INFO L226 Difference]: Without dead ends: 285 [2023-11-22 18:53:04,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=5178, Unknown=0, NotChecked=0, Total=5700 [2023-11-22 18:53:04,220 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:04,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 282 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:53:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-22 18:53:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 180. [2023-11-22 18:53:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0837988826815643) internal successors, (194), 179 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 18:53:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2023-11-22 18:53:04,242 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 83 [2023-11-22 18:53:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:04,243 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2023-11-22 18:53:04,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:53:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2023-11-22 18:53:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-22 18:53:04,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:04,244 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:04,252 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 18:53:04,449 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,SelfDestructingSolverStorable16 [2023-11-22 18:53:04,450 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:04,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:04,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1237452851, now seen corresponding path program 13 times [2023-11-22 18:53:04,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:04,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70950557] [2023-11-22 18:53:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:04,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 175 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:53:04,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:04,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70950557] [2023-11-22 18:53:04,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70950557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:04,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635947758] [2023-11-22 18:53:04,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:53:04,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:04,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:04,872 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 18:53:04,875 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 18:53:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:04,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 18:53:04,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 216 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:53:05,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 216 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 18:53:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635947758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:05,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:05,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2023-11-22 18:53:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432996506] [2023-11-22 18:53:05,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:05,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-22 18:53:05,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-22 18:53:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1934, Unknown=0, NotChecked=0, Total=2550 [2023-11-22 18:53:05,946 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand has 51 states, 51 states have (on average 4.254901960784314) internal successors, (217), 51 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 18:53:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:06,352 INFO L93 Difference]: Finished difference Result 287 states and 305 transitions. [2023-11-22 18:53:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 18:53:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.254901960784314) internal successors, (217), 51 states have internal predecessors, (217), 0 states have call successors, (0), 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 88 [2023-11-22 18:53:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:06,353 INFO L225 Difference]: With dead ends: 287 [2023-11-22 18:53:06,353 INFO L226 Difference]: Without dead ends: 207 [2023-11-22 18:53:06,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2023-11-22 18:53:06,354 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 246 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:06,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 273 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:53:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-22 18:53:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2023-11-22 18:53:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.065) internal successors, (213), 200 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 18:53:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 213 transitions. [2023-11-22 18:53:06,378 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 213 transitions. Word has length 88 [2023-11-22 18:53:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:06,378 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 213 transitions. [2023-11-22 18:53:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.254901960784314) internal successors, (217), 51 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 18:53:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 213 transitions. [2023-11-22 18:53:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-22 18:53:06,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:06,379 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:06,390 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 18:53:06,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:06,579 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:06,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -451588813, now seen corresponding path program 14 times [2023-11-22 18:53:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:06,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930237824] [2023-11-22 18:53:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:53:06,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:06,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930237824] [2023-11-22 18:53:06,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930237824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:06,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565737096] [2023-11-22 18:53:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:53:06,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:06,754 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 18:53:06,760 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 18:53:06,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:53:06,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:06,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:53:06,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:53:07,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:53:07,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565737096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:07,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:07,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 22 [2023-11-22 18:53:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655268548] [2023-11-22 18:53:07,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 18:53:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 18:53:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-11-22 18:53:07,204 INFO L87 Difference]: Start difference. First operand 201 states and 213 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:53:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:07,865 INFO L93 Difference]: Finished difference Result 359 states and 386 transitions. [2023-11-22 18:53:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-22 18:53:07,865 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 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 90 [2023-11-22 18:53:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:07,866 INFO L225 Difference]: With dead ends: 359 [2023-11-22 18:53:07,866 INFO L226 Difference]: Without dead ends: 207 [2023-11-22 18:53:07,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=537, Invalid=1815, Unknown=0, NotChecked=0, Total=2352 [2023-11-22 18:53:07,867 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 258 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:07,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 311 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:53:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-22 18:53:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 190. [2023-11-22 18:53:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0740740740740742) internal successors, (203), 189 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 18:53:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2023-11-22 18:53:07,892 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 90 [2023-11-22 18:53:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:07,892 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2023-11-22 18:53:07,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:53:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2023-11-22 18:53:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-22 18:53:07,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:07,893 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:07,904 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 18:53:08,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:08,096 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:08,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1324395076, now seen corresponding path program 15 times [2023-11-22 18:53:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:08,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315882143] [2023-11-22 18:53:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:08,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 38 proven. 35 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:53:08,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315882143] [2023-11-22 18:53:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315882143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376354727] [2023-11-22 18:53:08,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:53:08,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:08,334 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 18:53:08,337 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 18:53:09,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-22 18:53:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:09,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 18:53:09,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:53:09,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-22 18:53:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376354727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:09,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:09,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2023-11-22 18:53:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065398537] [2023-11-22 18:53:09,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:53:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:53:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:53:09,466 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:53:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:10,047 INFO L93 Difference]: Finished difference Result 430 states and 458 transitions. [2023-11-22 18:53:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-22 18:53:10,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 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 93 [2023-11-22 18:53:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:10,048 INFO L225 Difference]: With dead ends: 430 [2023-11-22 18:53:10,048 INFO L226 Difference]: Without dead ends: 295 [2023-11-22 18:53:10,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 18:53:10,049 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 547 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:10,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 211 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:53:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-22 18:53:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 215. [2023-11-22 18:53:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0560747663551402) internal successors, (226), 214 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 18:53:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 226 transitions. [2023-11-22 18:53:10,078 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 226 transitions. Word has length 93 [2023-11-22 18:53:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:10,078 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 226 transitions. [2023-11-22 18:53:10,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 18:53:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 226 transitions. [2023-11-22 18:53:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-22 18:53:10,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:10,079 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:10,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-22 18:53:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:10,279 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:10,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -91407268, now seen corresponding path program 16 times [2023-11-22 18:53:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137041654] [2023-11-22 18:53:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 18 proven. 220 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:53:11,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137041654] [2023-11-22 18:53:11,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137041654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24764865] [2023-11-22 18:53:11,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:53:11,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:11,710 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 18:53:11,728 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 18:53:11,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:53:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:11,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-22 18:53:11,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:12,029 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 18:53:12,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:12,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:53:12,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:12,086 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 31 treesize of output 11 [2023-11-22 18:53:12,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:12,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 33 [2023-11-22 18:53:12,500 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 15 treesize of output 7 [2023-11-22 18:53:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 58 proven. 195 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 18:53:12,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:14,289 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 59 treesize of output 53 [2023-11-22 18:53:14,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:53:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 58 proven. 178 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-22 18:53:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24764865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:14,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:14,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 52 [2023-11-22 18:53:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694745667] [2023-11-22 18:53:14,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-22 18:53:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-22 18:53:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2429, Unknown=1, NotChecked=0, Total=2652 [2023-11-22 18:53:14,448 INFO L87 Difference]: Start difference. First operand 215 states and 226 transitions. Second operand has 52 states, 52 states have (on average 4.384615384615385) internal successors, (228), 52 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 18:53:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:17,439 INFO L93 Difference]: Finished difference Result 306 states and 326 transitions. [2023-11-22 18:53:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-22 18:53:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.384615384615385) internal successors, (228), 52 states have internal predecessors, (228), 0 states have call successors, (0), 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 97 [2023-11-22 18:53:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:17,444 INFO L225 Difference]: With dead ends: 306 [2023-11-22 18:53:17,444 INFO L226 Difference]: Without dead ends: 297 [2023-11-22 18:53:17,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 171 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1243, Invalid=11638, Unknown=1, NotChecked=0, Total=12882 [2023-11-22 18:53:17,447 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 463 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:17,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 804 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3570 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 18:53:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-22 18:53:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 220. [2023-11-22 18:53:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0502283105022832) internal successors, (230), 219 states have internal predecessors, (230), 0 states have call successors, (0), 0 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 18:53:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 230 transitions. [2023-11-22 18:53:17,493 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 230 transitions. Word has length 97 [2023-11-22 18:53:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:17,493 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 230 transitions. [2023-11-22 18:53:17,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.384615384615385) internal successors, (228), 52 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 18:53:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 230 transitions. [2023-11-22 18:53:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-22 18:53:17,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:17,495 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:17,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 18:53:17,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:17,704 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:17,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1642171244, now seen corresponding path program 17 times [2023-11-22 18:53:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646390007] [2023-11-22 18:53:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 289 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:53:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646390007] [2023-11-22 18:53:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646390007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:18,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298760163] [2023-11-22 18:53:18,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:53:18,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:18,752 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 18:53:18,780 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 18:53:21,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-22 18:53:21,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:21,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-22 18:53:21,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:21,963 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 18:53:21,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:21,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:53:22,062 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 23 treesize of output 11 [2023-11-22 18:53:22,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:22,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:53:22,113 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 23 treesize of output 11 [2023-11-22 18:53:22,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:22,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:53:22,156 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 23 treesize of output 11 [2023-11-22 18:53:22,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:22,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-22 18:53:22,180 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 23 treesize of output 11 [2023-11-22 18:53:22,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:22,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:53:22,620 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 15 treesize of output 7 [2023-11-22 18:53:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:53:22,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:23,348 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 19 treesize of output 17 [2023-11-22 18:53:23,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-22 18:53:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 267 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:53:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298760163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:23,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:23,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 55 [2023-11-22 18:53:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996404545] [2023-11-22 18:53:23,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:23,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 18:53:23,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:23,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 18:53:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:53:23,524 INFO L87 Difference]: Start difference. First operand 220 states and 230 transitions. Second operand has 55 states, 55 states have (on average 4.890909090909091) internal successors, (269), 55 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 18:53:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:26,995 INFO L93 Difference]: Finished difference Result 391 states and 422 transitions. [2023-11-22 18:53:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-22 18:53:26,996 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.890909090909091) internal successors, (269), 55 states have internal predecessors, (269), 0 states have call successors, (0), 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 102 [2023-11-22 18:53:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:26,997 INFO L225 Difference]: With dead ends: 391 [2023-11-22 18:53:26,998 INFO L226 Difference]: Without dead ends: 372 [2023-11-22 18:53:26,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1268, Invalid=13494, Unknown=0, NotChecked=0, Total=14762 [2023-11-22 18:53:26,999 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 911 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:26,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 751 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 18:53:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-22 18:53:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 248. [2023-11-22 18:53:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0526315789473684) internal successors, (260), 247 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 18:53:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 260 transitions. [2023-11-22 18:53:27,037 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 260 transitions. Word has length 102 [2023-11-22 18:53:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:27,038 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 260 transitions. [2023-11-22 18:53:27,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.890909090909091) internal successors, (269), 55 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 18:53:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 260 transitions. [2023-11-22 18:53:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-22 18:53:27,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:27,038 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:27,047 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 18:53:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:27,239 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:27,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1787260130, now seen corresponding path program 18 times [2023-11-22 18:53:27,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:27,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997680949] [2023-11-22 18:53:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:53:27,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997680949] [2023-11-22 18:53:27,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997680949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665089240] [2023-11-22 18:53:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:53:27,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:27,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:27,905 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 18:53:27,932 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 18:53:28,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-22 18:53:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:28,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 18:53:28,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:28,942 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 13 treesize of output 9 [2023-11-22 18:53:28,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:28,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 31 [2023-11-22 18:53:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:53:29,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:29,371 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 17 treesize of output 15 [2023-11-22 18:53:29,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-22 18:53:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:53:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665089240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:29,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:29,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2023-11-22 18:53:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799174816] [2023-11-22 18:53:29,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:29,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-22 18:53:29,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-22 18:53:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2023-11-22 18:53:29,386 INFO L87 Difference]: Start difference. First operand 248 states and 260 transitions. Second operand has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:53:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:31,761 INFO L93 Difference]: Finished difference Result 395 states and 419 transitions. [2023-11-22 18:53:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-22 18:53:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 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 107 [2023-11-22 18:53:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:31,762 INFO L225 Difference]: With dead ends: 395 [2023-11-22 18:53:31,762 INFO L226 Difference]: Without dead ends: 393 [2023-11-22 18:53:31,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4891 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1025, Invalid=13737, Unknown=0, NotChecked=0, Total=14762 [2023-11-22 18:53:31,765 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:31,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 428 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 18:53:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-22 18:53:31,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 253. [2023-11-22 18:53:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0555555555555556) internal successors, (266), 252 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 18:53:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 266 transitions. [2023-11-22 18:53:31,805 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 266 transitions. Word has length 107 [2023-11-22 18:53:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:31,806 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 266 transitions. [2023-11-22 18:53:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.852941176470588) internal successors, (165), 34 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:53:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 266 transitions. [2023-11-22 18:53:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-22 18:53:31,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:31,820 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:31,828 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 18:53:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:32,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:32,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1748536531, now seen corresponding path program 19 times [2023-11-22 18:53:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407773026] [2023-11-22 18:53:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 54 proven. 67 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:53:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407773026] [2023-11-22 18:53:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407773026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851282723] [2023-11-22 18:53:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:53:32,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:32,354 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 18:53:32,373 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 18:53:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:32,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 18:53:32,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:53:32,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-22 18:53:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851282723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:32,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:32,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-22 18:53:32,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844079470] [2023-11-22 18:53:32,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:32,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:53:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:53:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:53:32,994 INFO L87 Difference]: Start difference. First operand 253 states and 266 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:53:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:34,045 INFO L93 Difference]: Finished difference Result 578 states and 607 transitions. [2023-11-22 18:53:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-22 18:53:34,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 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 108 [2023-11-22 18:53:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:34,047 INFO L225 Difference]: With dead ends: 578 [2023-11-22 18:53:34,047 INFO L226 Difference]: Without dead ends: 486 [2023-11-22 18:53:34,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1044, Invalid=4068, Unknown=0, NotChecked=0, Total=5112 [2023-11-22 18:53:34,049 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 924 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:34,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 228 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:53:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-22 18:53:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 263. [2023-11-22 18:53:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0534351145038168) internal successors, (276), 262 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 18:53:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 276 transitions. [2023-11-22 18:53:34,092 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 276 transitions. Word has length 108 [2023-11-22 18:53:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:34,092 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 276 transitions. [2023-11-22 18:53:34,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:53:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 276 transitions. [2023-11-22 18:53:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-22 18:53:34,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:34,093 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:34,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-22 18:53:34,303 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,SelfDestructingSolverStorable23 [2023-11-22 18:53:34,304 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:34,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -384123966, now seen corresponding path program 20 times [2023-11-22 18:53:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:34,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482136327] [2023-11-22 18:53:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:34,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 35 proven. 86 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-22 18:53:34,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:34,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482136327] [2023-11-22 18:53:34,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482136327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:34,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747564034] [2023-11-22 18:53:34,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:53:34,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:34,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:34,645 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 18:53:34,646 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 18:53:34,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:53:34,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:34,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 18:53:34,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-22 18:53:35,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-22 18:53:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747564034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:35,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-22 18:53:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773804274] [2023-11-22 18:53:35,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:35,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 18:53:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 18:53:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-22 18:53:35,338 INFO L87 Difference]: Start difference. First operand 263 states and 276 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:53:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:35,948 INFO L93 Difference]: Finished difference Result 444 states and 464 transitions. [2023-11-22 18:53:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 18:53:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 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 111 [2023-11-22 18:53:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:35,949 INFO L225 Difference]: With dead ends: 444 [2023-11-22 18:53:35,949 INFO L226 Difference]: Without dead ends: 317 [2023-11-22 18:53:35,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 198 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:53:35,950 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:35,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 139 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:53:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-22 18:53:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 266. [2023-11-22 18:53:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.049056603773585) internal successors, (278), 265 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 18:53:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 278 transitions. [2023-11-22 18:53:35,994 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 278 transitions. Word has length 111 [2023-11-22 18:53:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:35,994 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 278 transitions. [2023-11-22 18:53:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:53:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 278 transitions. [2023-11-22 18:53:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-22 18:53:35,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:35,995 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:36,012 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 18:53:36,209 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,SelfDestructingSolverStorable24 [2023-11-22 18:53:36,209 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:36,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 703367852, now seen corresponding path program 21 times [2023-11-22 18:53:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:36,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183262300] [2023-11-22 18:53:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 322 proven. 78 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 18:53:36,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183262300] [2023-11-22 18:53:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183262300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370143292] [2023-11-22 18:53:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:53:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:36,772 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 18:53:36,775 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 18:53:37,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-22 18:53:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:37,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-22 18:53:37,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:38,084 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 13 treesize of output 9 [2023-11-22 18:53:38,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:38,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 31 [2023-11-22 18:53:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 79 proven. 319 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-22 18:53:38,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:53:38,950 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 17 treesize of output 15 [2023-11-22 18:53:38,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-22 18:53:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 79 proven. 319 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-22 18:53:39,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370143292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:53:39,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:53:39,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 60 [2023-11-22 18:53:39,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396842663] [2023-11-22 18:53:39,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:53:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-22 18:53:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:53:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-22 18:53:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2023-11-22 18:53:39,117 INFO L87 Difference]: Start difference. First operand 266 states and 278 transitions. Second operand has 60 states, 60 states have (on average 4.433333333333334) internal successors, (266), 60 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 18:53:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:53:42,813 INFO L93 Difference]: Finished difference Result 450 states and 474 transitions. [2023-11-22 18:53:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-22 18:53:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.433333333333334) internal successors, (266), 60 states have internal predecessors, (266), 0 states have call successors, (0), 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 112 [2023-11-22 18:53:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:53:42,814 INFO L225 Difference]: With dead ends: 450 [2023-11-22 18:53:42,814 INFO L226 Difference]: Without dead ends: 351 [2023-11-22 18:53:42,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5984 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1916, Invalid=18106, Unknown=0, NotChecked=0, Total=20022 [2023-11-22 18:53:42,816 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1015 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 3395 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 3395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:53:42,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1182 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 3395 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-22 18:53:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-22 18:53:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2023-11-22 18:53:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0379746835443038) internal successors, (246), 237 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 18:53:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 246 transitions. [2023-11-22 18:53:42,858 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 246 transitions. Word has length 112 [2023-11-22 18:53:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:53:42,859 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 246 transitions. [2023-11-22 18:53:42,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.433333333333334) internal successors, (266), 60 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 18:53:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 246 transitions. [2023-11-22 18:53:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-22 18:53:42,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:53:42,859 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:53:42,881 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 18:53:43,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 18:53:43,067 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:53:43,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:53:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 169516429, now seen corresponding path program 22 times [2023-11-22 18:53:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:53:43,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083368651] [2023-11-22 18:53:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:53:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:53:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:53:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 28 proven. 245 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:53:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:53:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083368651] [2023-11-22 18:53:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083368651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:53:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952581403] [2023-11-22 18:53:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:53:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:53:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:53:46,855 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 18:53:46,859 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 18:53:47,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:53:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:53:47,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-22 18:53:47,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:53:47,629 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 18:53:47,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:47,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-22 18:53:47,740 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 19 treesize of output 18 [2023-11-22 18:53:47,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:47,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2023-11-22 18:53:47,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:47,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-22 18:53:47,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:47,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 38 [2023-11-22 18:53:48,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:48,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2023-11-22 18:53:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:48,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 56 [2023-11-22 18:53:48,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:48,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 56 [2023-11-22 18:53:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:48,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:48,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 70 [2023-11-22 18:53:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:52,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 59 [2023-11-22 18:53:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:52,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 73 [2023-11-22 18:53:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:52,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 59 [2023-11-22 18:53:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:52,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:52,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 73 [2023-11-22 18:53:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:53,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 59 [2023-11-22 18:53:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:53,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 66 [2023-11-22 18:53:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:53,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 59 [2023-11-22 18:53:53,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:53,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:53,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 66 [2023-11-22 18:53:58,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:53:58,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:53:58,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 59 [2023-11-22 18:54:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:05,162 INFO L349 Elim1Store]: treesize reduction 128, result has 25.6 percent of original size [2023-11-22 18:54:05,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 114 treesize of output 81 [2023-11-22 18:54:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:10,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 59 [2023-11-22 18:54:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,654 INFO L349 Elim1Store]: treesize reduction 128, result has 25.6 percent of original size [2023-11-22 18:54:10,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 114 treesize of output 81 [2023-11-22 18:54:10,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:10,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:10,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 59 [2023-11-22 18:54:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:15,842 INFO L349 Elim1Store]: treesize reduction 128, result has 25.6 percent of original size [2023-11-22 18:54:15,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 114 treesize of output 81 [2023-11-22 18:54:32,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:54:32,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:54:32,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 19 [2023-11-22 18:54:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 17 proven. 314 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:54:32,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:54:56,421 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 248 treesize of output 232 [2023-11-22 18:54:56,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 474 treesize of output 470 [2023-11-22 18:54:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 26 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-22 18:54:56,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952581403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:54:56,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:54:56,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 28] total 94 [2023-11-22 18:54:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034799634] [2023-11-22 18:54:56,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:54:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-22 18:54:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:54:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-22 18:54:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=8000, Unknown=18, NotChecked=0, Total=8742 [2023-11-22 18:54:56,800 INFO L87 Difference]: Start difference. First operand 238 states and 246 transitions. Second operand has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 94 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 18:55:11,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:12,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:14,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:18,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:20,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:23,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:25,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:27,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:30,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:32,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:34,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:36,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:38,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:40,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:42,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:45,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:47,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:49,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:51,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:55:53,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:56:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:56:08,894 INFO L93 Difference]: Finished difference Result 595 states and 634 transitions. [2023-11-22 18:56:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2023-11-22 18:56:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 94 states have internal predecessors, (280), 0 states have call successors, (0), 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 114 [2023-11-22 18:56:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:56:08,896 INFO L225 Difference]: With dead ends: 595 [2023-11-22 18:56:08,896 INFO L226 Difference]: Without dead ends: 566 [2023-11-22 18:56:08,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 158 SyntacticMatches, 27 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31910 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=9327, Invalid=85818, Unknown=27, NotChecked=0, Total=95172 [2023-11-22 18:56:08,901 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4130 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 7220 mSolverCounterSat, 1824 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4130 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 9078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1824 IncrementalHoareTripleChecker+Valid, 7220 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2023-11-22 18:56:08,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4130 Valid, 1292 Invalid, 9078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1824 Valid, 7220 Invalid, 34 Unknown, 0 Unchecked, 50.9s Time] [2023-11-22 18:56:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-22 18:56:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 268. [2023-11-22 18:56:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0337078651685394) internal successors, (276), 267 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 18:56:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 276 transitions. [2023-11-22 18:56:08,951 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 276 transitions. Word has length 114 [2023-11-22 18:56:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:56:08,952 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 276 transitions. [2023-11-22 18:56:08,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 94 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 18:56:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 276 transitions. [2023-11-22 18:56:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-22 18:56:08,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:56:08,953 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:56:08,965 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 18:56:09,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:56:09,157 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:56:09,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:56:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1515352771, now seen corresponding path program 23 times [2023-11-22 18:56:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:56:09,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012714932] [2023-11-22 18:56:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:56:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:56:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:56:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:56:11,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:56:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012714932] [2023-11-22 18:56:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012714932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:56:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228019428] [2023-11-22 18:56:11,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:56:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:56:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:56:11,180 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 18:56:11,180 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 18:56:16,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-22 18:56:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:56:16,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-22 18:56:16,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:56:16,895 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 18:56:16,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-22 18:56:16,958 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 19 treesize of output 18 [2023-11-22 18:56:16,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:16,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2023-11-22 18:56:17,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-22 18:56:17,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 38 [2023-11-22 18:56:17,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-22 18:56:17,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 48 [2023-11-22 18:56:17,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-22 18:56:17,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 58 [2023-11-22 18:56:17,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 55 [2023-11-22 18:56:17,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 65 [2023-11-22 18:56:17,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 58 [2023-11-22 18:56:17,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 65 [2023-11-22 18:56:17,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 58 [2023-11-22 18:56:17,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 65 [2023-11-22 18:56:17,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 58 [2023-11-22 18:56:17,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 65 [2023-11-22 18:56:17,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 58 [2023-11-22 18:56:17,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 65 [2023-11-22 18:56:17,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 58 [2023-11-22 18:56:17,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:17,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 58 [2023-11-22 18:56:18,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:56:19,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 19 [2023-11-22 18:56:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:56:19,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:56:28,920 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 19 treesize of output 17 [2023-11-22 18:56:28,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-22 18:56:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 423 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-22 18:56:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228019428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:56:29,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:56:29,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34, 28] total 80 [2023-11-22 18:56:29,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894200612] [2023-11-22 18:56:29,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:56:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-22 18:56:29,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:56:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-22 18:56:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=5822, Unknown=2, NotChecked=0, Total=6320 [2023-11-22 18:56:29,139 INFO L87 Difference]: Start difference. First operand 268 states and 276 transitions. Second operand has 80 states, 80 states have (on average 4.275) internal successors, (342), 80 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15