/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/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 18:50:16,286 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 18:50:16,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 18:50:16,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 18:50:16,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 18:50:16,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 18:50:16,379 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 18:50:16,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 18:50:16,380 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 18:50:16,383 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 18:50:16,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 18:50:16,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 18:50:16,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 18:50:16,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 18:50:16,384 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 18:50:16,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 18:50:16,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 18:50:16,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 18:50:16,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 18:50:16,385 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 18:50:16,385 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 18:50:16,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 18:50:16,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 18:50:16,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 18:50:16,386 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 18:50:16,386 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 18:50:16,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 18:50:16,387 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 18:50:16,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 18:50:16,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 18:50:16,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 18:50:16,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 18:50:16,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:50:16,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 18:50:16,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 18:50:16,389 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 18:50:16,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 18:50:16,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 18:50:16,389 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 18:50:16,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 18:50:16,390 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 18:50:16,390 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 18:50:16,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 18:50:16,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 18:50:16,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 18:50:16,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 18:50:16,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 18:50:16,605 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 18:50:16,606 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 18:50:16,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2023-12-19 18:50:17,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 18:50:17,768 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 18:50:17,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2023-12-19 18:50:17,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c25ef5c/1f30cb9b8bc940f5967376a36bb03788/FLAG799b9196a [2023-12-19 18:50:17,782 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c25ef5c/1f30cb9b8bc940f5967376a36bb03788 [2023-12-19 18:50:17,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 18:50:17,784 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 18:50:17,785 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 18:50:17,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 18:50:17,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 18:50:17,788 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:17,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3ddd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17, skipping insertion in model container [2023-12-19 18:50:17,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:17,803 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 18:50:17,886 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2023-12-19 18:50:17,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:50:17,910 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 18:50:17,918 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2023-12-19 18:50:17,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:50:17,945 INFO L206 MainTranslator]: Completed translation [2023-12-19 18:50:17,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17 WrapperNode [2023-12-19 18:50:17,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 18:50:17,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 18:50:17,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 18:50:17,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 18:50:17,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:17,958 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:17,973 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 128 [2023-12-19 18:50:17,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 18:50:17,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 18:50:17,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 18:50:17,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 18:50:17,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:17,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:17,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,009 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2023-12-19 18:50:18,009 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,009 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,013 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,016 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,017 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,018 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 18:50:18,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 18:50:18,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 18:50:18,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 18:50:18,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (1/1) ... [2023-12-19 18:50:18,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:50:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:18,042 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) [2023-12-19 18:50:18,060 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 [2023-12-19 18:50:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 18:50:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 18:50:18,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 18:50:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 18:50:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 18:50:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-19 18:50:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-19 18:50:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-19 18:50:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 18:50:18,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 18:50:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-19 18:50:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-19 18:50:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-19 18:50:18,070 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-19 18:50:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-19 18:50:18,129 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 18:50:18,131 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 18:50:18,269 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 18:50:18,303 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 18:50:18,303 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-19 18:50:18,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:50:18 BoogieIcfgContainer [2023-12-19 18:50:18,303 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 18:50:18,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 18:50:18,305 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 18:50:18,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 18:50:18,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:50:17" (1/3) ... [2023-12-19 18:50:18,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730bf2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:50:18, skipping insertion in model container [2023-12-19 18:50:18,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:50:17" (2/3) ... [2023-12-19 18:50:18,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730bf2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:50:18, skipping insertion in model container [2023-12-19 18:50:18,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:50:18" (3/3) ... [2023-12-19 18:50:18,309 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-12-19 18:50:18,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 18:50:18,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 18:50:18,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 18:50:18,363 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;@7bcd7614, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 18:50:18,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 18:50:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 18:50:18,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:18,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:18,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:18,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 347330670, now seen corresponding path program 1 times [2023-12-19 18:50:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:18,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639021959] [2023-12-19 18:50:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:18,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:18,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:18,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639021959] [2023-12-19 18:50:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639021959] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:50:18,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:50:18,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:50:18,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867544824] [2023-12-19 18:50:18,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:50:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:50:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:50:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:50:18,541 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 18:50:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:18,597 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2023-12-19 18:50:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:50:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-19 18:50:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:18,602 INFO L225 Difference]: With dead ends: 66 [2023-12-19 18:50:18,602 INFO L226 Difference]: Without dead ends: 32 [2023-12-19 18:50:18,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:50:18,606 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:18,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:50:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-19 18:50:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-19 18:50:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-12-19 18:50:18,632 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 32 [2023-12-19 18:50:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:18,632 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-12-19 18:50:18,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 18:50:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-12-19 18:50:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 18:50:18,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:18,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:18,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 18:50:18,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:18,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash 116060780, now seen corresponding path program 1 times [2023-12-19 18:50:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:18,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047560881] [2023-12-19 18:50:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:18,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:18,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047560881] [2023-12-19 18:50:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047560881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:50:18,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:50:18,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 18:50:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031855754] [2023-12-19 18:50:18,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:50:18,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 18:50:18,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 18:50:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 18:50:18,897 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:19,010 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-12-19 18:50:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:50:19,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-12-19 18:50:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:19,041 INFO L225 Difference]: With dead ends: 50 [2023-12-19 18:50:19,041 INFO L226 Difference]: Without dead ends: 35 [2023-12-19 18:50:19,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-19 18:50:19,042 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:19,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 132 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:50:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-19 18:50:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-12-19 18:50:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-12-19 18:50:19,051 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 32 [2023-12-19 18:50:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:19,052 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-12-19 18:50:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-12-19 18:50:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-19 18:50:19,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:19,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 18:50:19,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:19,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash 155328277, now seen corresponding path program 1 times [2023-12-19 18:50:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982619133] [2023-12-19 18:50:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:19,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982619133] [2023-12-19 18:50:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982619133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630439605] [2023-12-19 18:50:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:19,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:19,548 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) [2023-12-19 18:50:19,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 18:50:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:19,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-19 18:50:19,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:19,814 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 [2023-12-19 18:50:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 18:50:19,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:19,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-19 18:50:19,911 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 14 treesize of output 12 [2023-12-19 18:50:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:20,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630439605] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:50:20,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:50:20,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 22 [2023-12-19 18:50:20,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130947310] [2023-12-19 18:50:20,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:20,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 18:50:20,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:20,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 18:50:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2023-12-19 18:50:20,015 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 18:50:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:20,354 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2023-12-19 18:50:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 18:50:20,355 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2023-12-19 18:50:20,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:20,357 INFO L225 Difference]: With dead ends: 64 [2023-12-19 18:50:20,358 INFO L226 Difference]: Without dead ends: 62 [2023-12-19 18:50:20,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 18:50:20,359 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:20,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 309 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:50:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-19 18:50:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2023-12-19 18:50:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-12-19 18:50:20,365 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2023-12-19 18:50:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:20,365 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-12-19 18:50:20,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 18:50:20,366 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-12-19 18:50:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 18:50:20,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:20,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:20,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:20,571 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 [2023-12-19 18:50:20,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:20,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1372620684, now seen corresponding path program 2 times [2023-12-19 18:50:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268522157] [2023-12-19 18:50:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:20,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:20,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:20,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268522157] [2023-12-19 18:50:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268522157] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572373289] [2023-12-19 18:50:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:50:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:20,682 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) [2023-12-19 18:50:20,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 18:50:20,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-19 18:50:20,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:50:20,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-19 18:50:20,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:20,788 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 16 treesize of output 12 [2023-12-19 18:50:20,877 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-12-19 18:50:20,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2023-12-19 18:50:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:50:20,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:50:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572373289] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:50:20,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:50:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-19 18:50:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531831973] [2023-12-19 18:50:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:50:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 18:50:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 18:50:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-12-19 18:50:20,894 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:21,000 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-12-19 18:50:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 18:50:21,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-12-19 18:50:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:21,003 INFO L225 Difference]: With dead ends: 82 [2023-12-19 18:50:21,003 INFO L226 Difference]: Without dead ends: 80 [2023-12-19 18:50:21,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:50:21,005 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:21,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 145 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:50:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-19 18:50:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-12-19 18:50:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-12-19 18:50:21,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 34 [2023-12-19 18:50:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:21,024 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-12-19 18:50:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-12-19 18:50:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 18:50:21,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:21,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:21,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:21,231 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 [2023-12-19 18:50:21,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:21,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1709789265, now seen corresponding path program 1 times [2023-12-19 18:50:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549429896] [2023-12-19 18:50:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:21,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549429896] [2023-12-19 18:50:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549429896] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677617362] [2023-12-19 18:50:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:21,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:21,381 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) [2023-12-19 18:50:21,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 18:50:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 18:50:21,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:21,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677617362] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:50:21,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:50:21,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2023-12-19 18:50:21,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189950437] [2023-12-19 18:50:21,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:21,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 18:50:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 18:50:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-12-19 18:50:21,534 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:21,621 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2023-12-19 18:50:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:50:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-12-19 18:50:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:21,624 INFO L225 Difference]: With dead ends: 70 [2023-12-19 18:50:21,624 INFO L226 Difference]: Without dead ends: 60 [2023-12-19 18:50:21,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:50:21,625 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:21,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 197 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:50:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-19 18:50:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-12-19 18:50:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2023-12-19 18:50:21,643 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 36 [2023-12-19 18:50:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:21,643 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2023-12-19 18:50:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2023-12-19 18:50:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 18:50:21,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:21,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:21,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:21,854 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 [2023-12-19 18:50:21,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:21,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash -635961222, now seen corresponding path program 2 times [2023-12-19 18:50:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:21,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340651146] [2023-12-19 18:50:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:50:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340651146] [2023-12-19 18:50:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340651146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517421082] [2023-12-19 18:50:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:50:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:21,969 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) [2023-12-19 18:50:21,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 18:50:22,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:50:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:50:22,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 18:50:22,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 18:50:22,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:50:22,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517421082] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:50:22,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:50:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-12-19 18:50:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626720015] [2023-12-19 18:50:22,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:50:22,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 18:50:22,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 18:50:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-12-19 18:50:22,081 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:22,145 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2023-12-19 18:50:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:50:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-12-19 18:50:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:22,145 INFO L225 Difference]: With dead ends: 86 [2023-12-19 18:50:22,145 INFO L226 Difference]: Without dead ends: 76 [2023-12-19 18:50:22,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:50:22,146 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:22,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:50:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-19 18:50:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2023-12-19 18:50:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-12-19 18:50:22,163 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 37 [2023-12-19 18:50:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:22,163 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-12-19 18:50:22,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-12-19 18:50:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 18:50:22,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:22,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:22,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:22,369 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 [2023-12-19 18:50:22,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:22,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1832489573, now seen corresponding path program 1 times [2023-12-19 18:50:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:22,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003897397] [2023-12-19 18:50:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:22,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:22,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:22,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:22,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:50:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003897397] [2023-12-19 18:50:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003897397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252696471] [2023-12-19 18:50:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:22,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:22,468 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) [2023-12-19 18:50:22,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 18:50:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:22,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 18:50:22,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:22,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252696471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:50:22,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:50:22,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-12-19 18:50:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76618863] [2023-12-19 18:50:22,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:22,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 18:50:22,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 18:50:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:50:22,623 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:22,863 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2023-12-19 18:50:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 18:50:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-12-19 18:50:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:22,864 INFO L225 Difference]: With dead ends: 93 [2023-12-19 18:50:22,864 INFO L226 Difference]: Without dead ends: 67 [2023-12-19 18:50:22,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-12-19 18:50:22,864 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 102 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:22,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 230 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:50:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-19 18:50:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2023-12-19 18:50:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-12-19 18:50:22,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 37 [2023-12-19 18:50:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:22,870 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-12-19 18:50:22,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-12-19 18:50:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 18:50:22,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:22,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:22,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:23,075 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 [2023-12-19 18:50:23,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:23,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402438, now seen corresponding path program 1 times [2023-12-19 18:50:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:23,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464546400] [2023-12-19 18:50:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:23,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464546400] [2023-12-19 18:50:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464546400] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472404122] [2023-12-19 18:50:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:23,177 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) [2023-12-19 18:50:23,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 18:50:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 18:50:23,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:23,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:50:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472404122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:50:23,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:50:23,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2023-12-19 18:50:23,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122005679] [2023-12-19 18:50:23,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 18:50:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 18:50:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-19 18:50:23,306 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:23,406 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-12-19 18:50:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 18:50:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-12-19 18:50:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:23,407 INFO L225 Difference]: With dead ends: 58 [2023-12-19 18:50:23,407 INFO L226 Difference]: Without dead ends: 40 [2023-12-19 18:50:23,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:50:23,407 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:23,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 184 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:50:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-19 18:50:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-12-19 18:50:23,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-12-19 18:50:23,411 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 37 [2023-12-19 18:50:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:23,411 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-12-19 18:50:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-12-19 18:50:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 18:50:23,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:23,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:23,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:23,616 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 [2023-12-19 18:50:23,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:23,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2140225731, now seen corresponding path program 1 times [2023-12-19 18:50:23,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:23,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322113099] [2023-12-19 18:50:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:23,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:50:23,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:23,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322113099] [2023-12-19 18:50:23,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322113099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:23,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686573179] [2023-12-19 18:50:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:23,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:23,731 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) [2023-12-19 18:50:23,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:50:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:23,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 18:50:23,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:50:23,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:50:23,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686573179] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:50:23,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:50:23,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2023-12-19 18:50:23,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515339219] [2023-12-19 18:50:23,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:50:23,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:50:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:23,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:50:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-19 18:50:23,824 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:23,854 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-12-19 18:50:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 18:50:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-12-19 18:50:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:23,855 INFO L225 Difference]: With dead ends: 46 [2023-12-19 18:50:23,855 INFO L226 Difference]: Without dead ends: 40 [2023-12-19 18:50:23,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-19 18:50:23,856 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:23,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:50:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-19 18:50:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2023-12-19 18:50:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-12-19 18:50:23,859 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2023-12-19 18:50:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:23,859 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-12-19 18:50:23,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-12-19 18:50:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-19 18:50:23,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:23,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:23,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:24,065 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 [2023-12-19 18:50:24,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:24,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -216897549, now seen corresponding path program 1 times [2023-12-19 18:50:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464778712] [2023-12-19 18:50:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:24,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:24,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:50:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464778712] [2023-12-19 18:50:24,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464778712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816017511] [2023-12-19 18:50:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:24,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:24,209 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) [2023-12-19 18:50:24,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 18:50:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:24,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:50:24,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:50:24,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-19 18:50:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816017511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:50:24,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:50:24,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2023-12-19 18:50:24,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958784294] [2023-12-19 18:50:24,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 18:50:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 18:50:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-19 18:50:24,471 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:24,620 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-12-19 18:50:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 18:50:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-12-19 18:50:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:24,621 INFO L225 Difference]: With dead ends: 48 [2023-12-19 18:50:24,621 INFO L226 Difference]: Without dead ends: 42 [2023-12-19 18:50:24,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-12-19 18:50:24,622 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:24,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:50:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-19 18:50:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-12-19 18:50:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-12-19 18:50:24,626 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 41 [2023-12-19 18:50:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:24,626 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-12-19 18:50:24,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:50:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-12-19 18:50:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-19 18:50:24,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:24,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:24,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 18:50:24,827 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 [2023-12-19 18:50:24,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:24,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash 392718574, now seen corresponding path program 1 times [2023-12-19 18:50:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:24,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430246663] [2023-12-19 18:50:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:24,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:25,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:25,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 18:50:25,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430246663] [2023-12-19 18:50:25,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430246663] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648121459] [2023-12-19 18:50:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:25,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:26,052 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) [2023-12-19 18:50:26,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 18:50:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:26,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-19 18:50:26,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:26,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-19 18:50:26,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:50:26,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2023-12-19 18:50:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:50:26,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:26,837 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 84 treesize of output 76 [2023-12-19 18:50:26,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:50:26,843 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 170 treesize of output 138 [2023-12-19 18:50:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 18:50:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648121459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:50:27,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:50:27,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 13] total 41 [2023-12-19 18:50:27,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052092091] [2023-12-19 18:50:27,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:27,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-19 18:50:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-19 18:50:27,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 18:50:27,036 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 41 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 39 states have internal predecessors, (70), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 18:50:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:50:28,564 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2023-12-19 18:50:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-19 18:50:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 39 states have internal predecessors, (70), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2023-12-19 18:50:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:50:28,565 INFO L225 Difference]: With dead ends: 86 [2023-12-19 18:50:28,565 INFO L226 Difference]: Without dead ends: 84 [2023-12-19 18:50:28,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2023-12-19 18:50:28,567 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 344 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:28,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 339 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:50:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-19 18:50:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 41. [2023-12-19 18:50:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 18:50:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-19 18:50:28,573 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 42 [2023-12-19 18:50:28,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:50:28,574 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-19 18:50:28,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 39 states have internal predecessors, (70), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 18:50:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-19 18:50:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 18:50:28,574 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:50:28,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:28,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:28,790 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 [2023-12-19 18:50:28,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:50:28,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:50:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash -7009320, now seen corresponding path program 1 times [2023-12-19 18:50:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:50:28,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629697936] [2023-12-19 18:50:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:50:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:50:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:28,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:50:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:50:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:50:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 18:50:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:50:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629697936] [2023-12-19 18:50:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629697936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276028049] [2023-12-19 18:50:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:50:28,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:50:28,970 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) [2023-12-19 18:50:28,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 18:50:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:50:29,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-19 18:50:29,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:50:29,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-19 18:50:29,074 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 7 treesize of output 6 [2023-12-19 18:50:29,129 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-19 18:50:29,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-19 18:50:29,160 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 10 [2023-12-19 18:50:29,189 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 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-19 18:50:29,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-19 18:50:29,219 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 0 case distinctions, treesize of input 33 treesize of output 29 [2023-12-19 18:50:29,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2023-12-19 18:50:29,401 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 0 case distinctions, treesize of input 52 treesize of output 46 [2023-12-19 18:50:29,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2023-12-19 18:50:29,674 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 0 case distinctions, treesize of input 81 treesize of output 73 [2023-12-19 18:50:29,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2023-12-19 18:50:29,944 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 85 treesize of output 79 [2023-12-19 18:50:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 18:50:29,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:50:55,196 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_#t~mem18#1_21| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (let ((.cse8 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| .cse8) (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse8))) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 .cse8) |v_ULTIMATE.start_main_#t~mem18#1_21|)))) (let ((.cse1 (store (let ((.cse7 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse6 (+ .cse7 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4)) (.cse5 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 .cse6 (+ (select .cse5 .cse6) (select .cse5 (+ .cse7 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)))))) (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse8) 0)) (.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ .cse4 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse3)))))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-12-19 18:50:59,241 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_#t~mem18#1_21| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) |v_ULTIMATE.start_main_#t~mem18#1_21|)))) (let ((.cse1 (let ((.cse5 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse3 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4))) (store .cse3 .cse4 (+ (select .cse3 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)) (select .cse3 .cse4))))))) (let ((.cse2 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse2) |ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|) .cse2)))) (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-12-19 18:50:59,277 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_#t~mem18#1_21| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_317 |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) |v_ULTIMATE.start_main_#t~mem18#1_21|)))) (let ((.cse2 (let ((.cse5 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse3 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4))) (store .cse3 .cse4 (+ (select .cse3 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)) (select .cse3 .cse4))))))) (let ((.cse0 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse0) |ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|))))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-12-19 18:50:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276028049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:50:59,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:50:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24] total 30 [2023-12-19 18:50:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134381521] [2023-12-19 18:50:59,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:50:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 18:50:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:50:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 18:50:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1710, Unknown=7, NotChecked=258, Total=2162 [2023-12-19 18:50:59,281 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 18:51:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:01,459 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2023-12-19 18:51:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-19 18:51:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-19 18:51:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:01,460 INFO L225 Difference]: With dead ends: 127 [2023-12-19 18:51:01,460 INFO L226 Difference]: Without dead ends: 106 [2023-12-19 18:51:01,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=690, Invalid=4865, Unknown=7, NotChecked=444, Total=6006 [2023-12-19 18:51:01,462 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 347 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:01,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 248 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:51:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-19 18:51:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2023-12-19 18:51:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:51:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2023-12-19 18:51:01,473 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 45 [2023-12-19 18:51:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:01,473 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2023-12-19 18:51:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 18:51:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2023-12-19 18:51:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-19 18:51:01,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:01,473 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:01,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:01,678 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 [2023-12-19 18:51:01,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:01,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash -55608881, now seen corresponding path program 2 times [2023-12-19 18:51:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200456881] [2023-12-19 18:51:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:51:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:51:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:51:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:51:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:51:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200456881] [2023-12-19 18:51:01,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200456881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123742756] [2023-12-19 18:51:01,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:51:01,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:01,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:01,824 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) [2023-12-19 18:51:01,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 18:51:02,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:51:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:51:02,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:51:02,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:51:02,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:51:02,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123742756] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:51:02,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:51:02,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-12-19 18:51:02,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124823248] [2023-12-19 18:51:02,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:02,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 18:51:02,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 18:51:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-12-19 18:51:02,154 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:51:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:02,390 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2023-12-19 18:51:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 18:51:02,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2023-12-19 18:51:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:02,391 INFO L225 Difference]: With dead ends: 111 [2023-12-19 18:51:02,391 INFO L226 Difference]: Without dead ends: 92 [2023-12-19 18:51:02,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-12-19 18:51:02,392 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:02,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 295 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:51:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-19 18:51:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2023-12-19 18:51:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:51:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2023-12-19 18:51:02,430 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 46 [2023-12-19 18:51:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:02,431 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2023-12-19 18:51:02,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:51:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2023-12-19 18:51:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-19 18:51:02,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:02,432 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:02,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:02,636 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 [2023-12-19 18:51:02,637 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:02,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash -438440861, now seen corresponding path program 3 times [2023-12-19 18:51:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:02,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856724187] [2023-12-19 18:51:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:02,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:51:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 18:51:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-19 18:51:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 18:51:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-19 18:51:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:02,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856724187] [2023-12-19 18:51:02,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856724187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:02,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630395067] [2023-12-19 18:51:02,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:51:02,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:02,769 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) [2023-12-19 18:51:02,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 18:51:02,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-19 18:51:02,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:51:02,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 18:51:02,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 18:51:03,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 18:51:03,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630395067] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:51:03,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:51:03,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2023-12-19 18:51:03,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307866068] [2023-12-19 18:51:03,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 18:51:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 18:51:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2023-12-19 18:51:03,324 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 28 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-19 18:51:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:03,921 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2023-12-19 18:51:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-19 18:51:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2023-12-19 18:51:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:03,923 INFO L225 Difference]: With dead ends: 143 [2023-12-19 18:51:03,923 INFO L226 Difference]: Without dead ends: 128 [2023-12-19 18:51:03,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2023-12-19 18:51:03,924 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 106 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:03,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 544 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:51:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-19 18:51:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 86. [2023-12-19 18:51:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:51:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-12-19 18:51:03,965 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 47 [2023-12-19 18:51:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:03,965 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-12-19 18:51:03,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-19 18:51:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-12-19 18:51:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-19 18:51:03,965 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:03,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:03,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:04,171 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 [2023-12-19 18:51:04,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:04,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash -701990587, now seen corresponding path program 1 times [2023-12-19 18:51:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:04,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956336297] [2023-12-19 18:51:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:51:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-19 18:51:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 18:51:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 18:51:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 18:51:04,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:04,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956336297] [2023-12-19 18:51:04,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956336297] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:04,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688526488] [2023-12-19 18:51:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:04,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:04,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:04,291 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) [2023-12-19 18:51:04,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 18:51:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 18:51:04,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 18:51:04,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 18:51:04,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688526488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:51:04,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:51:04,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 10 [2023-12-19 18:51:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464978217] [2023-12-19 18:51:04,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:04,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 18:51:04,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 18:51:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:51:04,458 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:51:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:04,571 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2023-12-19 18:51:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:51:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-12-19 18:51:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:04,572 INFO L225 Difference]: With dead ends: 109 [2023-12-19 18:51:04,572 INFO L226 Difference]: Without dead ends: 93 [2023-12-19 18:51:04,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:51:04,573 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:04,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:51:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-19 18:51:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2023-12-19 18:51:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 76 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:51:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-12-19 18:51:04,591 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 49 [2023-12-19 18:51:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:04,591 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-12-19 18:51:04,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:51:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-12-19 18:51:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-19 18:51:04,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:04,591 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:04,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 18:51:04,796 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 [2023-12-19 18:51:04,796 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:04,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1190807663, now seen corresponding path program 2 times [2023-12-19 18:51:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:04,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203949893] [2023-12-19 18:51:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:51:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-19 18:51:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 18:51:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 18:51:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 18:51:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:04,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203949893] [2023-12-19 18:51:04,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203949893] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:04,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021487628] [2023-12-19 18:51:04,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:51:04,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:04,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:04,939 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) [2023-12-19 18:51:04,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 18:51:05,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:51:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:51:05,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:51:05,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 18:51:05,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:51:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 18:51:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021487628] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:51:05,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:51:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-12-19 18:51:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222332220] [2023-12-19 18:51:05,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:51:05,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 18:51:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:51:05,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 18:51:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-19 18:51:05,163 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:51:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:51:05,336 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2023-12-19 18:51:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 18:51:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-12-19 18:51:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:51:05,337 INFO L225 Difference]: With dead ends: 114 [2023-12-19 18:51:05,337 INFO L226 Difference]: Without dead ends: 95 [2023-12-19 18:51:05,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-19 18:51:05,338 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:51:05,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 234 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:51:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-19 18:51:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-12-19 18:51:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:51:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2023-12-19 18:51:05,359 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 49 [2023-12-19 18:51:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:51:05,359 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2023-12-19 18:51:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:51:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2023-12-19 18:51:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-19 18:51:05,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:51:05,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:51:05,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-19 18:51:05,565 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 [2023-12-19 18:51:05,565 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:51:05,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:51:05,565 INFO L85 PathProgramCache]: Analyzing trace with hash 692680964, now seen corresponding path program 3 times [2023-12-19 18:51:05,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:51:05,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461692420] [2023-12-19 18:51:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:51:05,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:51:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:05,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:51:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-19 18:51:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 18:51:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:05,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 18:51:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:51:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 18:51:05,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:51:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461692420] [2023-12-19 18:51:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461692420] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:51:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189757372] [2023-12-19 18:51:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:51:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:51:05,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:51:05,675 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) [2023-12-19 18:51:05,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 18:51:05,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:51:05,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:51:05,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-19 18:51:05,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:51:05,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-19 18:51:05,793 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 7 treesize of output 6 [2023-12-19 18:51:05,843 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-19 18:51:05,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-19 18:51:05,878 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 10 [2023-12-19 18:51:05,956 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 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-19 18:51:05,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-19 18:51:06,000 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 0 case distinctions, treesize of input 33 treesize of output 29 [2023-12-19 18:51:06,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-12-19 18:51:06,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2023-12-19 18:51:06,294 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 0 case distinctions, treesize of input 71 treesize of output 65 [2023-12-19 18:51:08,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 104 [2023-12-19 18:51:08,777 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 0 case distinctions, treesize of input 146 treesize of output 138 [2023-12-19 18:51:09,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 410 treesize of output 398 [2023-12-19 18:51:09,351 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 757 treesize of output 751 [2023-12-19 18:51:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:51:09,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:52:26,844 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_525 (Array Int Int)) (|v_ULTIMATE.start_main_#t~mem18#1_31| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_30| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_56| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_30| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_56| 0) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_525 |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_525) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) |v_ULTIMATE.start_main_#t~mem18#1_31|)))) (let ((.cse2 (let ((.cse5 (* |v_ULTIMATE.start_upsweep_~left~0#1_56| 4))) (let ((.cse4 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_30| 4)) (.cse3 (let ((.cse6 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_30| 4))) (store .cse6 .cse7 (+ (select .cse6 |v_ULTIMATE.start_upsweep_~a#1.offset_30|) (select .cse6 .cse7)))))) (store .cse3 .cse4 (+ (select .cse3 .cse4) (select .cse3 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_30|)))))))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4) .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|))))))) is different from false [2023-12-19 18:52:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189757372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:52:26,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 18:52:26,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 27] total 34 [2023-12-19 18:52:26,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247693251] [2023-12-19 18:52:26,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 18:52:26,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 18:52:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:52:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 18:52:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2530, Unknown=23, NotChecked=104, Total=2970 [2023-12-19 18:52:26,848 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-19 18:52:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:52:27,923 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2023-12-19 18:52:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 18:52:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2023-12-19 18:52:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:52:27,924 INFO L225 Difference]: With dead ends: 95 [2023-12-19 18:52:27,924 INFO L226 Difference]: Without dead ends: 70 [2023-12-19 18:52:27,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=518, Invalid=3753, Unknown=23, NotChecked=128, Total=4422 [2023-12-19 18:52:27,925 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:52:27,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 165 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 18:52:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-19 18:52:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-19 18:52:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:52:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-12-19 18:52:27,940 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 50 [2023-12-19 18:52:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:52:27,940 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-12-19 18:52:27,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-19 18:52:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-12-19 18:52:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-19 18:52:27,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:52:27,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:52:27,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 18:52:28,145 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 [2023-12-19 18:52:28,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:52:28,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:52:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash 949203151, now seen corresponding path program 4 times [2023-12-19 18:52:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:52:28,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061487762] [2023-12-19 18:52:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:52:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:52:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:52:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-19 18:52:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 18:52:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 18:52:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-19 18:52:28,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:52:28,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061487762] [2023-12-19 18:52:28,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061487762] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:52:28,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816843743] [2023-12-19 18:52:28,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:52:28,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:52:28,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:52:28,270 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) [2023-12-19 18:52:28,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 18:52:28,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:52:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:52:28,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 18:52:28,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:52:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-19 18:52:28,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:52:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-19 18:52:28,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816843743] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:52:28,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:52:28,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 10 [2023-12-19 18:52:28,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665612503] [2023-12-19 18:52:28,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:52:28,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 18:52:28,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:52:28,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 18:52:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:52:28,494 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:52:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:52:28,608 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2023-12-19 18:52:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:52:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2023-12-19 18:52:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:52:28,609 INFO L225 Difference]: With dead ends: 92 [2023-12-19 18:52:28,609 INFO L226 Difference]: Without dead ends: 84 [2023-12-19 18:52:28,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:52:28,609 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:52:28,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:52:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-19 18:52:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2023-12-19 18:52:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 18:52:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2023-12-19 18:52:28,628 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 52 [2023-12-19 18:52:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:52:28,629 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2023-12-19 18:52:28,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 18:52:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2023-12-19 18:52:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-19 18:52:28,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:52:28,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:52:28,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 18:52:28,836 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 [2023-12-19 18:52:28,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:52:28,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:52:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash 140078603, now seen corresponding path program 5 times [2023-12-19 18:52:28,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:52:28,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433322374] [2023-12-19 18:52:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:52:28,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:52:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 18:52:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-19 18:52:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 18:52:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 18:52:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:52:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-19 18:52:28,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:52:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433322374] [2023-12-19 18:52:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433322374] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:52:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935244276] [2023-12-19 18:52:28,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:52:28,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:52:28,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:52:29,006 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) [2023-12-19 18:52:29,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 18:52:29,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-19 18:52:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:52:29,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 119 conjunts are in the unsatisfiable core [2023-12-19 18:52:29,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:52:29,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-19 18:52:29,289 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-19 18:52:29,289 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 11 treesize of output 11 [2023-12-19 18:52:29,337 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 [2023-12-19 18:52:29,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2023-12-19 18:52:29,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2023-12-19 18:52:29,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2023-12-19 18:52:29,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 34 [2023-12-19 18:52:29,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 34 [2023-12-19 18:52:29,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-12-19 18:52:29,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2023-12-19 18:52:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 18:52:30,284 INFO L327 TraceCheckSpWp]: Computing backward predicates...