/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/sina1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:38:30,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:38:30,588 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 21:38:30,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:38:30,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:38:30,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:38:30,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:38:30,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:38:30,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:38:30,629 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:38:30,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:38:30,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:38:30,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:38:30,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:38:30,631 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:38:30,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:38:30,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:38:30,631 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:38:30,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:38:30,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:38:30,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:38:30,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:38:30,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:38:30,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:38:30,633 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:38:30,633 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:38:30,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:38:30,634 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:38:30,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:38:30,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:38:30,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:38:30,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:38:30,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:38:30,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:38:30,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:38:30,636 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:38:30,636 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:38:30,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:38:30,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:38:30,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:38:30,637 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:38:30,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:38:30,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:38:30,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:38:30,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:38:30,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:38:30,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:38:30,894 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:38:30,895 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:38:30,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina1.c [2023-12-18 21:38:32,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:38:32,272 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:38:32,276 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sina1.c [2023-12-18 21:38:32,287 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57196ac18/ffce795d12ff421190c91a3b6aa76e8a/FLAG6ee2e7e5f [2023-12-18 21:38:32,304 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57196ac18/ffce795d12ff421190c91a3b6aa76e8a [2023-12-18 21:38:32,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:38:32,308 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:38:32,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:38:32,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:38:32,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:38:32,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23cc655c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32, skipping insertion in model container [2023-12-18 21:38:32,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,333 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:38:32,444 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sina1.c[588,601] [2023-12-18 21:38:32,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:38:32,467 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:38:32,476 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sina1.c[588,601] [2023-12-18 21:38:32,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:38:32,498 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:38:32,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32 WrapperNode [2023-12-18 21:38:32,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:38:32,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:38:32,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:38:32,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:38:32,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,556 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-12-18 21:38:32,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:38:32,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:38:32,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:38:32,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:38:32,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,571 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,592 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 4, 8, 2]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0]. The 3 writes are split as follows [0, 2, 0, 1]. [2023-12-18 21:38:32,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,609 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,611 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:38:32,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:38:32,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:38:32,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:38:32,616 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (1/1) ... [2023-12-18 21:38:32,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:38:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:32,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 21:38:32,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 21:38:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:38:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:38:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 21:38:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 21:38:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 21:38:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 21:38:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 21:38:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 21:38:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 21:38:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 21:38:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 21:38:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:38:32,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:38:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 21:38:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 21:38:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 21:38:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 21:38:32,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 21:38:32,743 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:38:32,745 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:38:32,869 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:38:32,897 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:38:32,898 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 21:38:32,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:38:32 BoogieIcfgContainer [2023-12-18 21:38:32,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:38:32,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:38:32,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:38:32,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:38:32,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:38:32" (1/3) ... [2023-12-18 21:38:32,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f202e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:38:32, skipping insertion in model container [2023-12-18 21:38:32,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:32" (2/3) ... [2023-12-18 21:38:32,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f202e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:38:32, skipping insertion in model container [2023-12-18 21:38:32,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:38:32" (3/3) ... [2023-12-18 21:38:32,906 INFO L112 eAbstractionObserver]: Analyzing ICFG sina1.c [2023-12-18 21:38:32,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:38:32,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:38:32,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:38:32,967 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;@692ce87d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:38:32,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:38:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-18 21:38:32,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:32,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:32,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:32,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 955298750, now seen corresponding path program 1 times [2023-12-18 21:38:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:32,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071181728] [2023-12-18 21:38:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:33,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071181728] [2023-12-18 21:38:33,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071181728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:38:33,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:38:33,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 21:38:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324111642] [2023-12-18 21:38:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:38:33,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 21:38:33,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 21:38:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:38:33,231 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:33,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:33,260 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2023-12-18 21:38:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 21:38:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-18 21:38:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:33,298 INFO L225 Difference]: With dead ends: 29 [2023-12-18 21:38:33,298 INFO L226 Difference]: Without dead ends: 13 [2023-12-18 21:38:33,301 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 [2023-12-18 21:38:33,307 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:33,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:38:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-18 21:38:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-18 21:38:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 21:38:33,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2023-12-18 21:38:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:33,335 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 21:38:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 21:38:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-18 21:38:33,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:33,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:38:33,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:33,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1635357120, now seen corresponding path program 1 times [2023-12-18 21:38:33,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:33,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498507277] [2023-12-18 21:38:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:33,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:33,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498507277] [2023-12-18 21:38:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498507277] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:38:33,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:38:33,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:38:33,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347260476] [2023-12-18 21:38:33,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:38:33,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:38:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:33,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:38:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:38:33,582 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:33,616 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-12-18 21:38:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:38:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-18 21:38:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:33,621 INFO L225 Difference]: With dead ends: 28 [2023-12-18 21:38:33,621 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 21:38:33,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:38:33,622 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:33,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:38:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 21:38:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-12-18 21:38:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-18 21:38:33,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-12-18 21:38:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:33,627 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-18 21:38:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-18 21:38:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 21:38:33,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:33,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:38:33,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:33,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 714025838, now seen corresponding path program 1 times [2023-12-18 21:38:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142700391] [2023-12-18 21:38:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:34,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142700391] [2023-12-18 21:38:34,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142700391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206497090] [2023-12-18 21:38:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:34,284 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) [2023-12-18 21:38:34,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 21:38:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:34,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 21:38:34,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:34,442 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 [2023-12-18 21:38:34,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:34,583 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 [2023-12-18 21:38:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:34,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:34,698 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 18 treesize of output 16 [2023-12-18 21:38:34,702 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 [2023-12-18 21:38:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206497090] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:34,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-12-18 21:38:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683442979] [2023-12-18 21:38:34,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 21:38:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 21:38:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:38:34,801 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:35,051 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-12-18 21:38:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:38:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 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 13 [2023-12-18 21:38:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:35,053 INFO L225 Difference]: With dead ends: 32 [2023-12-18 21:38:35,053 INFO L226 Difference]: Without dead ends: 30 [2023-12-18 21:38:35,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2023-12-18 21:38:35,054 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:35,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 69 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:38:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-18 21:38:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2023-12-18 21:38:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-18 21:38:35,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2023-12-18 21:38:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:35,063 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-18 21:38:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-18 21:38:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:38:35,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:35,064 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:35,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:35,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:35,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:35,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1737434127, now seen corresponding path program 2 times [2023-12-18 21:38:35,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:35,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899426526] [2023-12-18 21:38:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:35,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899426526] [2023-12-18 21:38:35,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899426526] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:35,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915603013] [2023-12-18 21:38:35,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:38:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:35,348 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) [2023-12-18 21:38:35,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 21:38:35,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:38:35,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:35,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:38:35,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:35,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915603013] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:35,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:38:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222199563] [2023-12-18 21:38:35,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:35,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:38:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:35,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:38:35,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:38:35,506 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:35,610 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-12-18 21:38:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:38:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 14 [2023-12-18 21:38:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:35,625 INFO L225 Difference]: With dead ends: 45 [2023-12-18 21:38:35,625 INFO L226 Difference]: Without dead ends: 39 [2023-12-18 21:38:35,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:38:35,634 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:35,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 46 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:38:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-18 21:38:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2023-12-18 21:38:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-18 21:38:35,657 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2023-12-18 21:38:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:35,658 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-18 21:38:35,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-18 21:38:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 21:38:35,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:35,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:35,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 21:38:35,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:35,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -865209408, now seen corresponding path program 3 times [2023-12-18 21:38:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337026022] [2023-12-18 21:38:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:36,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:36,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337026022] [2023-12-18 21:38:36,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337026022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:36,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933515738] [2023-12-18 21:38:36,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:38:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:36,407 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) [2023-12-18 21:38:36,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 21:38:36,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 21:38:36,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:36,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-18 21:38:36,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:36,540 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 [2023-12-18 21:38:36,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:36,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:36,697 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 [2023-12-18 21:38:36,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:38:36,732 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 11 [2023-12-18 21:38:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:36,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:36,883 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 25 treesize of output 23 [2023-12-18 21:38:36,887 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 48 treesize of output 46 [2023-12-18 21:38:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933515738] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:37,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:37,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 27 [2023-12-18 21:38:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409215201] [2023-12-18 21:38:37,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 21:38:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 21:38:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-12-18 21:38:37,051 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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) [2023-12-18 21:38:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:38,196 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2023-12-18 21:38:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 21:38:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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) Word has length 15 [2023-12-18 21:38:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:38,226 INFO L225 Difference]: With dead ends: 84 [2023-12-18 21:38:38,226 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 21:38:38,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=564, Invalid=2976, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 21:38:38,238 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 190 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:38,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 88 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:38:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 21:38:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2023-12-18 21:38:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-18 21:38:38,290 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 15 [2023-12-18 21:38:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:38,290 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-18 21:38:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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) [2023-12-18 21:38:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-18 21:38:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 21:38:38,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:38,291 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:38,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:38,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:38,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:38,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1424043848, now seen corresponding path program 1 times [2023-12-18 21:38:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:38,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702503691] [2023-12-18 21:38:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:38:38,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:38,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702503691] [2023-12-18 21:38:38,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702503691] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:38,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618297851] [2023-12-18 21:38:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:38,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:38,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:38,561 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) [2023-12-18 21:38:38,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 21:38:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:38,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:38:38,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:38:38,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:38:38,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618297851] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:38,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:38,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:38:38,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510040823] [2023-12-18 21:38:38,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:38,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:38:38,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:38,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:38:38,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:38:38,702 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:38,772 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-12-18 21:38:38,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:38:38,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2023-12-18 21:38:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:38,773 INFO L225 Difference]: With dead ends: 71 [2023-12-18 21:38:38,773 INFO L226 Difference]: Without dead ends: 47 [2023-12-18 21:38:38,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:38:38,774 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:38,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:38:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-18 21:38:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-12-18 21:38:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2023-12-18 21:38:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-12-18 21:38:38,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 16 [2023-12-18 21:38:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:38,791 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-12-18 21:38:38,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-12-18 21:38:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:38:38,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:38,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:38,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:38,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:38,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:38,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1349497050, now seen corresponding path program 2 times [2023-12-18 21:38:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:38,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752361591] [2023-12-18 21:38:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:39,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752361591] [2023-12-18 21:38:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752361591] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112218588] [2023-12-18 21:38:39,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:38:39,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:39,419 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) [2023-12-18 21:38:39,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 21:38:39,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:38:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:39,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 21:38:39,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:39,542 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 [2023-12-18 21:38:39,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:39,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:39,755 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 [2023-12-18 21:38:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:39,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:39,988 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 20 treesize of output 18 [2023-12-18 21:38:39,999 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 [2023-12-18 21:38:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:40,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112218588] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:40,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:40,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 33 [2023-12-18 21:38:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588772948] [2023-12-18 21:38:40,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:40,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:38:40,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:40,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:38:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:38:40,172 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:40,747 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-12-18 21:38:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:38:40,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 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 18 [2023-12-18 21:38:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:40,775 INFO L225 Difference]: With dead ends: 44 [2023-12-18 21:38:40,775 INFO L226 Difference]: Without dead ends: 32 [2023-12-18 21:38:40,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=372, Invalid=1884, Unknown=0, NotChecked=0, Total=2256 [2023-12-18 21:38:40,792 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:40,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 80 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:38:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-18 21:38:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-12-18 21:38:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-12-18 21:38:40,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2023-12-18 21:38:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:40,874 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-12-18 21:38:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-12-18 21:38:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:38:40,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:40,893 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:40,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:41,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:41,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1105641471, now seen corresponding path program 4 times [2023-12-18 21:38:41,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:41,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232601066] [2023-12-18 21:38:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:41,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:41,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232601066] [2023-12-18 21:38:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232601066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753174625] [2023-12-18 21:38:41,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:38:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:41,301 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) [2023-12-18 21:38:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 21:38:41,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:38:41,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:41,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:38:41,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:41,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753174625] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:41,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-12-18 21:38:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196578425] [2023-12-18 21:38:41,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:41,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:38:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:38:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:38:41,529 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2023-12-18 21:38:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:41,804 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2023-12-18 21:38:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 21:38:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) Word has length 18 [2023-12-18 21:38:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:41,814 INFO L225 Difference]: With dead ends: 85 [2023-12-18 21:38:41,814 INFO L226 Difference]: Without dead ends: 76 [2023-12-18 21:38:41,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2023-12-18 21:38:41,825 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:41,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 161 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:38:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-18 21:38:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 31. [2023-12-18 21:38:41,844 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) [2023-12-18 21:38:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-12-18 21:38:41,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2023-12-18 21:38:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:41,862 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-12-18 21:38:41,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2023-12-18 21:38:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-12-18 21:38:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 21:38:41,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:41,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:41,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:42,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:42,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1948195384, now seen corresponding path program 3 times [2023-12-18 21:38:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:42,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618191581] [2023-12-18 21:38:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:42,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:42,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618191581] [2023-12-18 21:38:42,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618191581] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231953576] [2023-12-18 21:38:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:38:42,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:42,732 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) [2023-12-18 21:38:42,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 21:38:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:38:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:42,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-18 21:38:42,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:42,824 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 [2023-12-18 21:38:42,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:42,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:42,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:42,959 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 [2023-12-18 21:38:43,011 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-18 21:38:43,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:38:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:43,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:43,220 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 31 treesize of output 29 [2023-12-18 21:38:43,222 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 58 treesize of output 54 [2023-12-18 21:38:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 21:38:43,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231953576] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:43,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:43,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 31 [2023-12-18 21:38:43,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657183485] [2023-12-18 21:38:43,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:43,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 21:38:43,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 21:38:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-12-18 21:38:43,410 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:44,005 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2023-12-18 21:38:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 21:38:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 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 20 [2023-12-18 21:38:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:44,006 INFO L225 Difference]: With dead ends: 66 [2023-12-18 21:38:44,006 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 21:38:44,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2023-12-18 21:38:44,008 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 135 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:44,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 87 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:38:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 21:38:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2023-12-18 21:38:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-12-18 21:38:44,023 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 20 [2023-12-18 21:38:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:44,023 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-12-18 21:38:44,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-12-18 21:38:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 21:38:44,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:44,024 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:44,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:44,229 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:44,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1572653166, now seen corresponding path program 5 times [2023-12-18 21:38:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946152391] [2023-12-18 21:38:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946152391] [2023-12-18 21:38:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946152391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438225066] [2023-12-18 21:38:45,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:38:45,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:45,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:45,177 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) [2023-12-18 21:38:45,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 21:38:45,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 21:38:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:45,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-18 21:38:45,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:45,284 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 [2023-12-18 21:38:45,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:45,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:45,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:45,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:45,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:45,560 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 [2023-12-18 21:38:45,598 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 [2023-12-18 21:38:45,642 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 [2023-12-18 21:38:45,694 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 [2023-12-18 21:38:45,736 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 [2023-12-18 21:38:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:45,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:46,110 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 50 treesize of output 48 [2023-12-18 21:38:46,119 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 16562 treesize of output 16498 [2023-12-18 21:38:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438225066] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:46,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:46,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2023-12-18 21:38:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191482809] [2023-12-18 21:38:46,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:46,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-18 21:38:46,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-18 21:38:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 21:38:46,501 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2023-12-18 21:38:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:48,295 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2023-12-18 21:38:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-18 21:38:48,295 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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 21 [2023-12-18 21:38:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:48,296 INFO L225 Difference]: With dead ends: 131 [2023-12-18 21:38:48,296 INFO L226 Difference]: Without dead ends: 117 [2023-12-18 21:38:48,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=996, Invalid=6314, Unknown=0, NotChecked=0, Total=7310 [2023-12-18 21:38:48,299 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 300 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:48,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 369 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:38:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-18 21:38:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2023-12-18 21:38:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 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) [2023-12-18 21:38:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-18 21:38:48,321 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 21 [2023-12-18 21:38:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:48,321 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-18 21:38:48,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2023-12-18 21:38:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-18 21:38:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 21:38:48,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:48,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:48,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 21:38:48,528 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,SelfDestructingSolverStorable9 [2023-12-18 21:38:48,528 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:48,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash 800847278, now seen corresponding path program 4 times [2023-12-18 21:38:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341881036] [2023-12-18 21:38:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:38:48,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341881036] [2023-12-18 21:38:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341881036] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381773530] [2023-12-18 21:38:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:38:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:48,897 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) [2023-12-18 21:38:48,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 21:38:48,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:38:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:48,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 21:38:48,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:48,988 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 11 [2023-12-18 21:38:49,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 21:38:49,023 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 29 treesize of output 21 [2023-12-18 21:38:49,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 17 [2023-12-18 21:38:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:38:49,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:38:49,343 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 75 treesize of output 59 [2023-12-18 21:38:49,345 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 55 [2023-12-18 21:38:49,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:38:49,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10656 treesize of output 9888 [2023-12-18 21:38:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:38:49,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381773530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:38:49,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:38:49,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2023-12-18 21:38:49,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554596735] [2023-12-18 21:38:49,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:38:49,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-18 21:38:49,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:38:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-18 21:38:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2023-12-18 21:38:49,389 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:38:50,037 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2023-12-18 21:38:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 21:38:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2023-12-18 21:38:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:38:50,038 INFO L225 Difference]: With dead ends: 108 [2023-12-18 21:38:50,038 INFO L226 Difference]: Without dead ends: 92 [2023-12-18 21:38:50,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 21:38:50,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:38:50,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 157 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:38:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-18 21:38:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-12-18 21:38:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-12-18 21:38:50,061 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 23 [2023-12-18 21:38:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:38:50,061 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-12-18 21:38:50,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:38:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-12-18 21:38:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 21:38:50,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:38:50,062 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:38:50,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-18 21:38:50,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:50,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:38:50,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:38:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1436288960, now seen corresponding path program 6 times [2023-12-18 21:38:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:38:50,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327468449] [2023-12-18 21:38:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:38:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:38:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:38:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:38:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327468449] [2023-12-18 21:38:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327468449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:38:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035568749] [2023-12-18 21:38:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:38:51,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:38:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:38:51,092 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) [2023-12-18 21:38:51,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 21:38:51,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 21:38:51,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:38:51,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-18 21:38:51,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:38:51,208 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 [2023-12-18 21:38:51,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:51,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:51,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:51,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:51,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:51,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:38:51,427 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 [2023-12-18 21:38:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:38:51,456 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 11 [2023-12-18 21:38:51,491 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 21:38:51,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 21:38:51,537 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 21:38:51,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 21:38:51,592 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 21:38:51,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 21:38:51,644 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 21:38:51,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 21:38:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:38:51,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:39:47,171 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 53 treesize of output 51 [2023-12-18 21:39:47,179 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 3342 treesize of output 3334 [2023-12-18 21:39:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:39:48,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035568749] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:39:48,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:39:48,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 53 [2023-12-18 21:39:48,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178620464] [2023-12-18 21:39:48,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:39:48,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-18 21:39:48,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:39:48,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-18 21:39:48,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2348, Unknown=29, NotChecked=0, Total=2756 [2023-12-18 21:39:48,350 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:39:52,078 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2023-12-18 21:39:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-18 21:39:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 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 23 [2023-12-18 21:39:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:39:52,079 INFO L225 Difference]: With dead ends: 141 [2023-12-18 21:39:52,079 INFO L226 Difference]: Without dead ends: 139 [2023-12-18 21:39:52,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2840 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=1807, Invalid=8062, Unknown=31, NotChecked=0, Total=9900 [2023-12-18 21:39:52,082 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 373 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:39:52,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 244 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:39:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-18 21:39:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 62. [2023-12-18 21:39:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-12-18 21:39:52,105 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 23 [2023-12-18 21:39:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:39:52,105 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-12-18 21:39:52,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-12-18 21:39:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 21:39:52,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:39:52,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:39:52,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 21:39:52,319 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,SelfDestructingSolverStorable11 [2023-12-18 21:39:52,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:39:52,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:39:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -476990601, now seen corresponding path program 5 times [2023-12-18 21:39:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:39:52,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869486368] [2023-12-18 21:39:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:39:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:39:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:39:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:39:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:39:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869486368] [2023-12-18 21:39:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869486368] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:39:52,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763821784] [2023-12-18 21:39:52,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:39:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:39:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:39:52,440 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) [2023-12-18 21:39:52,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 21:39:52,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 21:39:52,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:39:52,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:39:52,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:39:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:39:52,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:39:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:39:52,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763821784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:39:52,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:39:52,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:39:52,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649284210] [2023-12-18 21:39:52,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:39:52,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:39:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:39:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:39:52,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:39:52,703 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:39:52,835 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-12-18 21:39:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:39:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 27 [2023-12-18 21:39:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:39:52,838 INFO L225 Difference]: With dead ends: 92 [2023-12-18 21:39:52,838 INFO L226 Difference]: Without dead ends: 78 [2023-12-18 21:39:52,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:39:52,839 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:39:52,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 57 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:39:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-18 21:39:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2023-12-18 21:39:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-18 21:39:52,870 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 27 [2023-12-18 21:39:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:39:52,870 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-18 21:39:52,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-18 21:39:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 21:39:52,873 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:39:52,873 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:39:52,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 21:39:53,078 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,SelfDestructingSolverStorable12 [2023-12-18 21:39:53,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:39:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:39:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1620060640, now seen corresponding path program 6 times [2023-12-18 21:39:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:39:53,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023644330] [2023-12-18 21:39:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:39:53,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:39:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:39:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:39:53,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:39:53,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023644330] [2023-12-18 21:39:53,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023644330] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:39:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872721035] [2023-12-18 21:39:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:39:53,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:39:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:39:53,233 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) [2023-12-18 21:39:53,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 21:39:53,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 21:39:53,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:39:53,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 21:39:53,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:39:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:39:53,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:39:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:39:53,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872721035] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:39:53,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:39:53,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2023-12-18 21:39:53,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060205569] [2023-12-18 21:39:53,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:39:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 21:39:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:39:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 21:39:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:39:53,527 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:39:53,809 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2023-12-18 21:39:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:39:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 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 27 [2023-12-18 21:39:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:39:53,810 INFO L225 Difference]: With dead ends: 133 [2023-12-18 21:39:53,810 INFO L226 Difference]: Without dead ends: 112 [2023-12-18 21:39:53,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 21:39:53,811 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 209 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:39:53,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 83 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:39:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-18 21:39:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 67. [2023-12-18 21:39:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-12-18 21:39:53,837 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 27 [2023-12-18 21:39:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:39:53,838 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-12-18 21:39:53,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-12-18 21:39:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 21:39:53,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:39:53,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:39:53,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 21:39:54,044 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,SelfDestructingSolverStorable13 [2023-12-18 21:39:54,044 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:39:54,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:39:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash -570976538, now seen corresponding path program 7 times [2023-12-18 21:39:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:39:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755724774] [2023-12-18 21:39:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:39:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:39:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:39:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:39:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:39:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755724774] [2023-12-18 21:39:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755724774] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:39:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963365085] [2023-12-18 21:39:54,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:39:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:39:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:39:54,641 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) [2023-12-18 21:39:54,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 21:39:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:39:54,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 21:39:54,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:39:54,762 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 11 [2023-12-18 21:39:54,784 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 15 [2023-12-18 21:39:54,807 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 15 [2023-12-18 21:39:54,830 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 27 treesize of output 19 [2023-12-18 21:39:54,832 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 15 treesize of output 15 [2023-12-18 21:39:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:39:55,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:39:55,442 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 91 treesize of output 75 [2023-12-18 21:39:55,444 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 75 treesize of output 71 [2023-12-18 21:39:55,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:39:55,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 391238 treesize of output 378950 [2023-12-18 21:39:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:39:55,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963365085] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:39:55,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:39:55,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 14] total 43 [2023-12-18 21:39:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048234872] [2023-12-18 21:39:55,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:39:55,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 21:39:55,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:39:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 21:39:55,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 21:39:55,572 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:39:56,834 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-12-18 21:39:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 21:39:56,834 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 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 28 [2023-12-18 21:39:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:39:56,835 INFO L225 Difference]: With dead ends: 91 [2023-12-18 21:39:56,835 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 21:39:56,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=607, Invalid=3949, Unknown=0, NotChecked=0, Total=4556 [2023-12-18 21:39:56,837 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 170 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:39:56,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 162 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:39:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 21:39:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2023-12-18 21:39:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-12-18 21:39:56,859 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2023-12-18 21:39:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:39:56,859 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-12-18 21:39:56,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:39:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-12-18 21:39:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 21:39:56,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:39:56,860 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:39:56,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 21:39:57,066 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,SelfDestructingSolverStorable14 [2023-12-18 21:39:57,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:39:57,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:39:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash -167148032, now seen corresponding path program 8 times [2023-12-18 21:39:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:39:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236211665] [2023-12-18 21:39:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:39:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:39:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:39:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:39:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:39:58,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236211665] [2023-12-18 21:39:58,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236211665] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:39:58,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268298164] [2023-12-18 21:39:58,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:39:58,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:39:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:39:58,049 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) [2023-12-18 21:39:58,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 21:39:58,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:39:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:39:58,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-18 21:39:58,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:39:58,212 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 [2023-12-18 21:39:58,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:39:58,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:39:58,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:39:58,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:39:58,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:39:58,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:39:58,502 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 [2023-12-18 21:39:58,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:39:58,538 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 11 [2023-12-18 21:39:58,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:39:58,550 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 11 [2023-12-18 21:39:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:39:58,584 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 11 [2023-12-18 21:39:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:39:58,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:40:02,961 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_246| Int) (|v_ULTIMATE.start_main_~i~0#1_247| Int) (v_ArrVal_640 Int) (v_ArrVal_638 Int) (v_ArrVal_635 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_246| (+ |v_ULTIMATE.start_main_~i~0#1_247| 1)) (< |v_ULTIMATE.start_main_~i~0#1_247| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= c_~N~0 (select (store (store (store (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_635) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_247| 4)) v_ArrVal_638) (+ (* |v_ULTIMATE.start_main_~i~0#1_246| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2023-12-18 21:40:02,970 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 41 treesize of output 39 [2023-12-18 21:40:02,974 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 1718 treesize of output 1686 [2023-12-18 21:40:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-18 21:40:03,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268298164] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:40:03,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:40:03,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 21] total 52 [2023-12-18 21:40:03,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895166993] [2023-12-18 21:40:03,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:40:03,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-18 21:40:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:40:03,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-18 21:40:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2248, Unknown=1, NotChecked=98, Total=2652 [2023-12-18 21:40:03,481 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:40:18,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 21:40:19,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 21:40:20,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 21:40:22,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 21:40:22,548 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (<= (mod c_~N~0 4294967296) 536870911) (forall ((|v_ULTIMATE.start_main_~i~0#1_246| Int) (v_ArrVal_640 Int) (v_ArrVal_638 Int)) (or (= c_~N~0 (select (store (store (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_638) (+ (* |v_ULTIMATE.start_main_~i~0#1_246| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_246| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (or (= c_~N~0 (+ 2 .cse0)) (not (= c_~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)))) (= c_~N~0 .cse0))) is different from false [2023-12-18 21:40:30,872 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse0 (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (or (not (= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (= c_~N~0 (+ 3 .cse0))) (or (not (= .cse1 c_~N~0)) (= (+ 1 .cse0) c_~N~0)) (or (= c_~N~0 (+ 6 .cse0)) (not (= c_~N~0 (+ 6 |c_ULTIMATE.start_main_~i~0#1|)))) (<= (mod c_~N~0 4294967296) 536870911) (or (= c_~N~0 (+ 5 .cse0)) (not (= c_~N~0 (+ 5 |c_ULTIMATE.start_main_~i~0#1|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_246| Int) (v_ArrVal_640 Int) (v_ArrVal_638 Int)) (or (= c_~N~0 (select (store (store (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_638) (+ (* |v_ULTIMATE.start_main_~i~0#1_246| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_246| .cse1))) (or (= c_~N~0 (+ 2 .cse0)) (not (= c_~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)))) (= c_~N~0 .cse0) (or (= c_~N~0 (+ 4 .cse0)) (not (= c_~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 4)))))) is different from false [2023-12-18 21:40:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:40:33,392 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2023-12-18 21:40:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-18 21:40:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 0 states have call successors, (0), 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 29 [2023-12-18 21:40:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:40:33,394 INFO L225 Difference]: With dead ends: 187 [2023-12-18 21:40:33,394 INFO L226 Difference]: Without dead ends: 167 [2023-12-18 21:40:33,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3346 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1292, Invalid=10482, Unknown=10, NotChecked=648, Total=12432 [2023-12-18 21:40:33,398 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 122 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-18 21:40:33,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 356 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1222 Invalid, 4 Unknown, 205 Unchecked, 5.8s Time] [2023-12-18 21:40:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-18 21:40:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2023-12-18 21:40:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 104 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) [2023-12-18 21:40:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2023-12-18 21:40:33,448 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 29 [2023-12-18 21:40:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:40:33,448 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2023-12-18 21:40:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:40:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2023-12-18 21:40:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 21:40:33,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:40:33,449 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:40:33,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 21:40:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:40:33,653 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:40:33,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:40:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1786871826, now seen corresponding path program 9 times [2023-12-18 21:40:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:40:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18293262] [2023-12-18 21:40:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:40:33,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:40:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:40:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:40:34,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:40:34,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18293262] [2023-12-18 21:40:34,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18293262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:40:34,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542868510] [2023-12-18 21:40:34,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:40:34,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:40:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:40:34,519 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) [2023-12-18 21:40:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 21:40:34,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 21:40:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:40:34,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-18 21:40:34,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:40:34,704 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 [2023-12-18 21:40:34,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:40:34,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:40:34,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:40:34,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:40:34,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:40:34,987 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 [2023-12-18 21:40:35,036 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 [2023-12-18 21:40:35,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:40:35,089 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 [2023-12-18 21:40:35,176 INFO L349 Elim1Store]: treesize reduction 60, result has 36.2 percent of original size [2023-12-18 21:40:35,176 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 6 case distinctions, treesize of input 45 treesize of output 43 [2023-12-18 21:40:35,266 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-12-18 21:40:35,267 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 6 case distinctions, treesize of input 47 treesize of output 52 [2023-12-18 21:40:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:40:35,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:40:59,456 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 66 treesize of output 64 [2023-12-18 21:40:59,459 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 2538 treesize of output 2514 [2023-12-18 21:41:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 35 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:41:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542868510] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:41:23,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:41:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 61 [2023-12-18 21:41:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279808514] [2023-12-18 21:41:23,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:41:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-18 21:41:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:41:23,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-18 21:41:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3210, Unknown=11, NotChecked=0, Total=3660 [2023-12-18 21:41:23,979 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 61 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 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) [2023-12-18 21:41:29,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 21:41:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:41:31,098 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2023-12-18 21:41:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-18 21:41:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 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) Word has length 33 [2023-12-18 21:41:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:41:31,098 INFO L225 Difference]: With dead ends: 122 [2023-12-18 21:41:31,098 INFO L226 Difference]: Without dead ends: 98 [2023-12-18 21:41:31,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=1045, Invalid=5748, Unknown=13, NotChecked=0, Total=6806 [2023-12-18 21:41:31,100 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 96 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 90 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:41:31,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 107 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 717 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2023-12-18 21:41:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-18 21:41:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-12-18 21:41:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 97 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2023-12-18 21:41:31,140 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 33 [2023-12-18 21:41:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:41:31,140 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2023-12-18 21:41:31,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 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) [2023-12-18 21:41:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2023-12-18 21:41:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 21:41:31,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:41:31,141 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:41:31,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 21:41:31,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 21:41:31,347 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:41:31,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:41:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1996807695, now seen corresponding path program 10 times [2023-12-18 21:41:31,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:41:31,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034820319] [2023-12-18 21:41:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:41:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:41:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:41:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-18 21:41:31,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:41:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034820319] [2023-12-18 21:41:31,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034820319] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:41:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986199592] [2023-12-18 21:41:31,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:41:31,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:41:31,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:41:31,541 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) [2023-12-18 21:41:31,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 21:41:31,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:41:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:41:31,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-18 21:41:31,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:41:31,665 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 11 [2023-12-18 21:41:31,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 21:41:31,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 21:41:31,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 21:41:31,751 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 29 treesize of output 21 [2023-12-18 21:41:31,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 17 [2023-12-18 21:41:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 21:41:32,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:41:32,490 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 107 treesize of output 91 [2023-12-18 21:41:32,492 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 91 treesize of output 87 [2023-12-18 21:41:32,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:32,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1992566 treesize of output 1967990 [2023-12-18 21:41:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 21:41:32,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986199592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:41:32,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:41:32,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2023-12-18 21:41:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985182697] [2023-12-18 21:41:32,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:41:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-18 21:41:32,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:41:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-18 21:41:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 21:41:32,612 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:41:33,613 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2023-12-18 21:41:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:41:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 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 34 [2023-12-18 21:41:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:41:33,613 INFO L225 Difference]: With dead ends: 110 [2023-12-18 21:41:33,613 INFO L226 Difference]: Without dead ends: 93 [2023-12-18 21:41:33,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=461, Invalid=3199, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 21:41:33,614 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:41:33,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 175 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:41:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-18 21:41:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2023-12-18 21:41:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2023-12-18 21:41:33,662 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 34 [2023-12-18 21:41:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:41:33,662 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2023-12-18 21:41:33,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2023-12-18 21:41:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 21:41:33,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:41:33,663 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:41:33,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 21:41:33,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 21:41:33,869 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:41:33,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:41:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash 536724545, now seen corresponding path program 11 times [2023-12-18 21:41:33,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:41:33,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637987391] [2023-12-18 21:41:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:41:33,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:41:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:41:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 66 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:41:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:41:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637987391] [2023-12-18 21:41:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637987391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:41:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690206402] [2023-12-18 21:41:34,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:41:34,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:41:34,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:41:34,233 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) [2023-12-18 21:41:34,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 21:41:34,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-18 21:41:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:41:34,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:41:34,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:41:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 78 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:41:34,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:41:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 78 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:41:34,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690206402] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:41:34,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:41:34,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2023-12-18 21:41:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634780748] [2023-12-18 21:41:34,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:41:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 21:41:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:41:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 21:41:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 21:41:34,965 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 44 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:41:35,963 INFO L93 Difference]: Finished difference Result 235 states and 259 transitions. [2023-12-18 21:41:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-18 21:41:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 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 36 [2023-12-18 21:41:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:41:35,965 INFO L225 Difference]: With dead ends: 235 [2023-12-18 21:41:35,965 INFO L226 Difference]: Without dead ends: 206 [2023-12-18 21:41:35,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1451, Invalid=5029, Unknown=0, NotChecked=0, Total=6480 [2023-12-18 21:41:35,966 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 255 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:41:35,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 550 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:41:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-12-18 21:41:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 97. [2023-12-18 21:41:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-12-18 21:41:36,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 36 [2023-12-18 21:41:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:41:36,006 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-12-18 21:41:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-12-18 21:41:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:41:36,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:41:36,007 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:41:36,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 21:41:36,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:41:36,208 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:41:36,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:41:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1624055462, now seen corresponding path program 12 times [2023-12-18 21:41:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:41:36,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114075854] [2023-12-18 21:41:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:41:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:41:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:41:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:41:37,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:41:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114075854] [2023-12-18 21:41:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114075854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:41:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321764733] [2023-12-18 21:41:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:41:37,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:41:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:41:37,129 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) [2023-12-18 21:41:37,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 21:41:37,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 21:41:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:41:37,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-18 21:41:37,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:41:37,285 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 [2023-12-18 21:41:37,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:41:37,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:41:37,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:41:37,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:41:37,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:41:37,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:41:37,638 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 [2023-12-18 21:41:37,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:37,698 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 11 [2023-12-18 21:41:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:37,753 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 11 [2023-12-18 21:41:37,806 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 21:41:37,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 21:41:37,867 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-18 21:41:37,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2023-12-18 21:41:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:38,818 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 21:41:38,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 40 [2023-12-18 21:41:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:41:38,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:42:00,413 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 110 treesize of output 106 [2023-12-18 21:42:00,429 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:42:00,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3168 treesize of output 3140 [2023-12-18 21:42:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:42:02,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321764733] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:42:02,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:42:02,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 28] total 76 [2023-12-18 21:42:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952475290] [2023-12-18 21:42:02,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:42:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-18 21:42:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:42:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-18 21:42:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=5017, Unknown=5, NotChecked=0, Total=5700 [2023-12-18 21:42:02,282 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 76 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:42:05,281 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-12-18 21:42:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-18 21:42:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 0 states have call successors, (0), 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 38 [2023-12-18 21:42:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:42:05,282 INFO L225 Difference]: With dead ends: 99 [2023-12-18 21:42:05,282 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 21:42:05,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2579 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1692, Invalid=10075, Unknown=5, NotChecked=0, Total=11772 [2023-12-18 21:42:05,283 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 135 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:42:05,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 219 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:42:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 21:42:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-18 21:42:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 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) [2023-12-18 21:42:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-18 21:42:05,318 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 38 [2023-12-18 21:42:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:42:05,319 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-18 21:42:05,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-18 21:42:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:42:05,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:42:05,319 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:42:05,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 21:42:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:05,523 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:42:05,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:42:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 37000632, now seen corresponding path program 13 times [2023-12-18 21:42:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:42:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598742853] [2023-12-18 21:42:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:42:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:42:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:42:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:42:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:42:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598742853] [2023-12-18 21:42:06,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598742853] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:42:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533163101] [2023-12-18 21:42:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:42:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:42:06,605 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) [2023-12-18 21:42:06,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 21:42:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:42:06,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-18 21:42:06,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:42:06,805 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 11 [2023-12-18 21:42:06,843 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 15 [2023-12-18 21:42:06,877 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 15 [2023-12-18 21:42:06,910 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 15 [2023-12-18 21:42:06,945 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 15 [2023-12-18 21:42:06,990 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 27 treesize of output 19 [2023-12-18 21:42:06,992 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 15 treesize of output 15 [2023-12-18 21:42:07,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:07,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:07,031 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 31 treesize of output 18 [2023-12-18 21:42:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 21:42:07,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:42:11,216 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 137 treesize of output 121 [2023-12-18 21:42:11,219 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 121 treesize of output 117 [2023-12-18 21:42:11,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:11,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 740713414638 treesize of output 737492189166 [2023-12-18 21:42:21,059 WARN L293 SmtUtils]: Spent 9.18s on a formula simplification. DAG size of input: 14805 DAG size of output: 169 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 21:42:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 21:42:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533163101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:42:21,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:42:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 19] total 60 [2023-12-18 21:42:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699502050] [2023-12-18 21:42:21,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:42:21,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-18 21:42:21,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:42:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-18 21:42:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3320, Unknown=3, NotChecked=0, Total=3540 [2023-12-18 21:42:21,487 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:42:23,685 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2023-12-18 21:42:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-18 21:42:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2023-12-18 21:42:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:42:23,686 INFO L225 Difference]: With dead ends: 112 [2023-12-18 21:42:23,686 INFO L226 Difference]: Without dead ends: 110 [2023-12-18 21:42:23,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=726, Invalid=8973, Unknown=3, NotChecked=0, Total=9702 [2023-12-18 21:42:23,688 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 156 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 21:42:23,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 411 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 21:42:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-18 21:42:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2023-12-18 21:42:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2023-12-18 21:42:23,724 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 40 [2023-12-18 21:42:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:42:23,724 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2023-12-18 21:42:23,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2023-12-18 21:42:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:42:23,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:42:23,724 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:42:23,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-18 21:42:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:23,925 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:42:23,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:42:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1515533778, now seen corresponding path program 14 times [2023-12-18 21:42:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:42:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466161833] [2023-12-18 21:42:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:42:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:42:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:42:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:42:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:42:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466161833] [2023-12-18 21:42:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466161833] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:42:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164884889] [2023-12-18 21:42:24,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:42:24,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:24,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:42:24,997 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) [2023-12-18 21:42:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 21:42:25,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:42:25,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:42:25,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-18 21:42:25,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:42:25,134 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 [2023-12-18 21:42:25,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 [2023-12-18 21:42:25,734 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 [2023-12-18 21:42:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:42:26,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:42:26,597 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 20 treesize of output 18 [2023-12-18 21:42:26,599 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 [2023-12-18 21:42:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:42:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164884889] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:42:27,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:42:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 76 [2023-12-18 21:42:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93544032] [2023-12-18 21:42:27,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:42:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-18 21:42:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:42:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-18 21:42:27,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=5226, Unknown=0, NotChecked=0, Total=5700 [2023-12-18 21:42:27,469 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 76 states, 76 states have (on average 1.5789473684210527) internal successors, (120), 76 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:42:29,177 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2023-12-18 21:42:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-18 21:42:29,180 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.5789473684210527) internal successors, (120), 76 states have internal predecessors, (120), 0 states have call successors, (0), 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 43 [2023-12-18 21:42:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:42:29,181 INFO L225 Difference]: With dead ends: 132 [2023-12-18 21:42:29,181 INFO L226 Difference]: Without dead ends: 76 [2023-12-18 21:42:29,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1028, Invalid=9892, Unknown=0, NotChecked=0, Total=10920 [2023-12-18 21:42:29,183 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:42:29,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 310 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:42:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-18 21:42:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-12-18 21:42:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-12-18 21:42:29,223 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 43 [2023-12-18 21:42:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:42:29,223 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-12-18 21:42:29,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.5789473684210527) internal successors, (120), 76 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-12-18 21:42:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:42:29,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:42:29,224 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:42:29,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-18 21:42:29,431 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,SelfDestructingSolverStorable21 [2023-12-18 21:42:29,431 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:42:29,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:42:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1778514386, now seen corresponding path program 15 times [2023-12-18 21:42:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:42:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99269359] [2023-12-18 21:42:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:42:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:42:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:42:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:42:31,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:42:31,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99269359] [2023-12-18 21:42:31,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99269359] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:42:31,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483222279] [2023-12-18 21:42:31,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:42:31,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:31,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:42:31,732 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) [2023-12-18 21:42:31,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 21:42:32,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-18 21:42:32,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:42:32,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-18 21:42:32,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:42:32,493 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 11 [2023-12-18 21:42:32,531 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 27 treesize of output 19 [2023-12-18 21:42:32,534 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 15 treesize of output 15 [2023-12-18 21:42:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,582 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 31 treesize of output 18 [2023-12-18 21:42:32,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,632 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 31 treesize of output 18 [2023-12-18 21:42:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,682 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 31 treesize of output 18 [2023-12-18 21:42:32,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,738 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 31 treesize of output 18 [2023-12-18 21:42:32,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,793 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 31 treesize of output 18 [2023-12-18 21:42:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,848 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 31 treesize of output 18 [2023-12-18 21:42:32,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:42:32,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,904 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 31 treesize of output 18 [2023-12-18 21:42:32,966 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2023-12-18 21:42:32,967 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 3 case distinctions, treesize of input 31 treesize of output 26 [2023-12-18 21:42:33,057 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2023-12-18 21:42:33,057 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 3 case distinctions, treesize of input 35 treesize of output 30 [2023-12-18 21:42:33,171 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2023-12-18 21:42:33,171 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 3 case distinctions, treesize of input 35 treesize of output 30 [2023-12-18 21:42:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 21:42:33,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:45:09,876 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 512 treesize of output 472 [2023-12-18 21:45:09,886 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 472 treesize of output 462