/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/condg.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 10:07:55,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 10:07:55,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 10:07:55,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 10:07:55,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 10:07:55,719 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 10:07:55,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 10:07:55,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 10:07:55,720 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 10:07:55,725 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 10:07:55,725 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 10:07:55,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 10:07:55,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 10:07:55,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 10:07:55,726 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 10:07:55,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 10:07:55,726 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 10:07:55,726 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 10:07:55,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 10:07:55,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 10:07:55,727 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 10:07:55,728 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 10:07:55,728 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 10:07:55,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 10:07:55,728 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 10:07:55,728 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 10:07:55,729 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 10:07:55,729 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 10:07:55,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 10:07:55,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 10:07:55,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 10:07:55,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 10:07:55,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:07:55,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 10:07:55,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 10:07:55,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 10:07:55,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 10:07:55,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 10:07:55,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 10:07:55,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 10:07:55,731 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 10:07:55,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 10:07:55,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 10:07:55,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 10:07:55,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 10:07:55,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 10:07:55,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 10:07:55,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 10:07:55,880 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 10:07:55,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condg.c [2023-12-20 10:07:56,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 10:07:56,925 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 10:07:56,926 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condg.c [2023-12-20 10:07:56,931 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f6335d4/736b89e86606479d9ca72d1063f36529/FLAGf29422bea [2023-12-20 10:07:56,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f6335d4/736b89e86606479d9ca72d1063f36529 [2023-12-20 10:07:56,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 10:07:56,953 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 10:07:56,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 10:07:56,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 10:07:56,958 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 10:07:56,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:07:56" (1/1) ... [2023-12-20 10:07:56,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e5c1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:56, skipping insertion in model container [2023-12-20 10:07:56,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:07:56" (1/1) ... [2023-12-20 10:07:56,983 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 10:07:57,118 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condg.c[588,601] [2023-12-20 10:07:57,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:07:57,139 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 10:07:57,147 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condg.c[588,601] [2023-12-20 10:07:57,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:07:57,162 INFO L206 MainTranslator]: Completed translation [2023-12-20 10:07:57,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57 WrapperNode [2023-12-20 10:07:57,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 10:07:57,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 10:07:57,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 10:07:57,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 10:07:57,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,188 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 97 [2023-12-20 10:07:57,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 10:07:57,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 10:07:57,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 10:07:57,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 10:07:57,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,226 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 7, 4]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 3, 2]. [2023-12-20 10:07:57,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,230 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,234 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 10:07:57,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 10:07:57,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 10:07:57,237 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 10:07:57,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (1/1) ... [2023-12-20 10:07:57,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:07:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:07:57,262 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) [2023-12-20 10:07:57,269 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 [2023-12-20 10:07:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 10:07:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 10:07:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 10:07:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 10:07:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 10:07:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 10:07:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 10:07:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 10:07:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 10:07:57,385 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 10:07:57,386 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 10:07:57,511 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 10:07:57,529 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 10:07:57,530 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-20 10:07:57,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:07:57 BoogieIcfgContainer [2023-12-20 10:07:57,530 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 10:07:57,532 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 10:07:57,532 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 10:07:57,534 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 10:07:57,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 10:07:56" (1/3) ... [2023-12-20 10:07:57,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69160356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:07:57, skipping insertion in model container [2023-12-20 10:07:57,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:07:57" (2/3) ... [2023-12-20 10:07:57,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69160356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:07:57, skipping insertion in model container [2023-12-20 10:07:57,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:07:57" (3/3) ... [2023-12-20 10:07:57,536 INFO L112 eAbstractionObserver]: Analyzing ICFG condg.c [2023-12-20 10:07:57,548 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 10:07:57,548 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 10:07:57,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 10:07:57,590 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;@7ad93e7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 10:07:57,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 10:07:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 10:07:57,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:07:57,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:07:57,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:07:57,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:07:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1932781911, now seen corresponding path program 1 times [2023-12-20 10:07:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:07:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329163503] [2023-12-20 10:07:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:07:57,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:07:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:07:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:07:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:07:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329163503] [2023-12-20 10:07:57,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329163503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:07:57,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:07:57,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 10:07:57,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590014529] [2023-12-20 10:07:57,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:07:57,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 10:07:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:07:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 10:07:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:07:57,827 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:07:57,859 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2023-12-20 10:07:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 10:07:57,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 10:07:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:07:57,866 INFO L225 Difference]: With dead ends: 37 [2023-12-20 10:07:57,866 INFO L226 Difference]: Without dead ends: 17 [2023-12-20 10:07:57,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:07:57,872 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:07:57,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:07:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-20 10:07:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-20 10:07:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-20 10:07:57,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 13 [2023-12-20 10:07:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:07:57,896 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-20 10:07:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-20 10:07:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 10:07:57,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:07:57,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:07:57,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 10:07:57,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:07:57,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:07:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1661120807, now seen corresponding path program 1 times [2023-12-20 10:07:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:07:57,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077343571] [2023-12-20 10:07:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:07:57,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:07:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:07:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:07:57,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:07:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077343571] [2023-12-20 10:07:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077343571] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:07:57,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:07:57,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 10:07:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805950100] [2023-12-20 10:07:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:07:57,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 10:07:57,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:07:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 10:07:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:07:57,998 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:07:58,032 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-12-20 10:07:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 10:07:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 10:07:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:07:58,033 INFO L225 Difference]: With dead ends: 39 [2023-12-20 10:07:58,033 INFO L226 Difference]: Without dead ends: 27 [2023-12-20 10:07:58,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:07:58,034 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:07:58,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:07:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-20 10:07:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-12-20 10:07:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 10:07:58,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2023-12-20 10:07:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:07:58,039 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 10:07:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 10:07:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 10:07:58,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:07:58,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:07:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 10:07:58,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:07:58,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:07:58,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1604932393, now seen corresponding path program 1 times [2023-12-20 10:07:58,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:07:58,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957073543] [2023-12-20 10:07:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:07:58,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:07:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:07:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:07:58,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:07:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957073543] [2023-12-20 10:07:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957073543] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:07:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293957897] [2023-12-20 10:07:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:07:58,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:07:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:07:58,617 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) [2023-12-20 10:07:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 10:07:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:07:58,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 10:07:58,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:07:58,751 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 [2023-12-20 10:07:58,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:07:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:07:58,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:07:58,877 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 14 treesize of output 12 [2023-12-20 10:07:58,880 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 [2023-12-20 10:07:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:07:58,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293957897] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:07:58,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:07:58,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-12-20 10:07:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374474998] [2023-12-20 10:07:58,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:07:58,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 10:07:58,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:07:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 10:07:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:07:58,894 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:07:59,106 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-12-20 10:07:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 10:07:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-20 10:07:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:07:59,108 INFO L225 Difference]: With dead ends: 51 [2023-12-20 10:07:59,108 INFO L226 Difference]: Without dead ends: 49 [2023-12-20 10:07:59,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-12-20 10:07:59,110 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:07:59,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 67 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:07:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-20 10:07:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 29. [2023-12-20 10:07:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-12-20 10:07:59,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2023-12-20 10:07:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:07:59,126 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-12-20 10:07:59,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:07:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-12-20 10:07:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 10:07:59,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:07:59,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:07:59,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 10:07:59,353 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 [2023-12-20 10:07:59,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:07:59,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:07:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 170074969, now seen corresponding path program 1 times [2023-12-20 10:07:59,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:07:59,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312083218] [2023-12-20 10:07:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:07:59,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:07:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:07:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:07:59,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:07:59,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312083218] [2023-12-20 10:07:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312083218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:07:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363319866] [2023-12-20 10:07:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:07:59,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:07:59,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:07:59,788 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) [2023-12-20 10:07:59,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 10:07:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:07:59,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 10:07:59,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:07:59,875 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 [2023-12-20 10:07:59,897 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 [2023-12-20 10:07:59,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:07:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:07:59,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:00,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-20 10:08:00,055 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 30 treesize of output 28 [2023-12-20 10:08:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:08:00,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363319866] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:00,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:00,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-20 10:08:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928929141] [2023-12-20 10:08:00,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:00,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 10:08:00,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 10:08:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-20 10:08:00,088 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:00,285 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-12-20 10:08:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 10:08:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-20 10:08:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:00,286 INFO L225 Difference]: With dead ends: 69 [2023-12-20 10:08:00,286 INFO L226 Difference]: Without dead ends: 55 [2023-12-20 10:08:00,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-12-20 10:08:00,287 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:00,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 83 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:08:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-20 10:08:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2023-12-20 10:08:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-12-20 10:08:00,295 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 18 [2023-12-20 10:08:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:00,295 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-12-20 10:08:00,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-12-20 10:08:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:08:00,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:00,296 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:00,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:00,517 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 [2023-12-20 10:08:00,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:00,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:00,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1326525823, now seen corresponding path program 2 times [2023-12-20 10:08:00,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:00,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276848341] [2023-12-20 10:08:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:00,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:08:00,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276848341] [2023-12-20 10:08:00,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276848341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504963919] [2023-12-20 10:08:00,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:08:00,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:00,610 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) [2023-12-20 10:08:00,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 10:08:00,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:08:00,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:00,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:08:00,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:08:00,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:08:00,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504963919] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:00,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:00,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 10:08:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329343432] [2023-12-20 10:08:00,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:00,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 10:08:00,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 10:08:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-20 10:08:00,725 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:00,823 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2023-12-20 10:08:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 10:08:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-20 10:08:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:00,824 INFO L225 Difference]: With dead ends: 99 [2023-12-20 10:08:00,825 INFO L226 Difference]: Without dead ends: 56 [2023-12-20 10:08:00,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-20 10:08:00,825 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:00,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 37 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:08:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-20 10:08:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2023-12-20 10:08:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-20 10:08:00,838 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 19 [2023-12-20 10:08:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:00,838 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-20 10:08:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-20 10:08:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:08:00,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:00,839 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:00,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:01,044 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 [2023-12-20 10:08:01,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:01,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1321942223, now seen corresponding path program 3 times [2023-12-20 10:08:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:01,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181906235] [2023-12-20 10:08:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:08:01,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:01,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181906235] [2023-12-20 10:08:01,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181906235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:01,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861938632] [2023-12-20 10:08:01,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:08:01,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:01,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:01,154 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) [2023-12-20 10:08:01,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 10:08:01,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 10:08:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:01,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:08:01,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:08:01,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:08:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861938632] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:01,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:01,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 10:08:01,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622479464] [2023-12-20 10:08:01,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:01,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 10:08:01,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 10:08:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-20 10:08:01,271 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:01,339 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-12-20 10:08:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 10:08:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-20 10:08:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:01,339 INFO L225 Difference]: With dead ends: 55 [2023-12-20 10:08:01,339 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 10:08:01,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:08:01,340 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:01,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 33 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:08:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 10:08:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-12-20 10:08:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-12-20 10:08:01,344 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2023-12-20 10:08:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:01,344 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-12-20 10:08:01,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-12-20 10:08:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-20 10:08:01,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:01,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:01,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:01,550 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 [2023-12-20 10:08:01,550 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:01,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1245009577, now seen corresponding path program 1 times [2023-12-20 10:08:01,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:01,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545744164] [2023-12-20 10:08:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:01,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545744164] [2023-12-20 10:08:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545744164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402819525] [2023-12-20 10:08:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:01,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:01,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:01,582 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) [2023-12-20 10:08:01,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 10:08:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:01,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 10:08:01,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:01,641 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 16 treesize of output 8 [2023-12-20 10:08:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:01,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402819525] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:01,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-20 10:08:01,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642740913] [2023-12-20 10:08:01,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:01,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 10:08:01,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:01,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 10:08:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 10:08:01,649 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:01,679 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-12-20 10:08:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 10:08:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-20 10:08:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:01,679 INFO L225 Difference]: With dead ends: 56 [2023-12-20 10:08:01,679 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 10:08:01,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 10:08:01,680 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:01,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:08:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 10:08:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2023-12-20 10:08:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-12-20 10:08:01,684 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 23 [2023-12-20 10:08:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:01,684 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-12-20 10:08:01,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-12-20 10:08:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-20 10:08:01,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:01,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:01,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:01,890 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 [2023-12-20 10:08:01,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:01,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash 529997785, now seen corresponding path program 4 times [2023-12-20 10:08:01,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:01,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269560830] [2023-12-20 10:08:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:01,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:08:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269560830] [2023-12-20 10:08:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269560830] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713239601] [2023-12-20 10:08:02,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:08:02,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:02,528 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) [2023-12-20 10:08:02,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 10:08:02,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:08:02,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:02,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-20 10:08:02,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:02,642 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 [2023-12-20 10:08:02,659 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 [2023-12-20 10:08:02,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-20 10:08:02,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-12-20 10:08:02,808 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-20 10:08:02,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 55 [2023-12-20 10:08:02,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 37 [2023-12-20 10:08:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:08:02,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:08:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713239601] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:03,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:03,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-12-20 10:08:03,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162989172] [2023-12-20 10:08:03,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:03,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 10:08:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 10:08:03,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-12-20 10:08:03,076 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:03,534 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2023-12-20 10:08:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:08:03,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-20 10:08:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:03,535 INFO L225 Difference]: With dead ends: 96 [2023-12-20 10:08:03,535 INFO L226 Difference]: Without dead ends: 68 [2023-12-20 10:08:03,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 10:08:03,537 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:03,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 137 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:08:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-20 10:08:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2023-12-20 10:08:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-12-20 10:08:03,568 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 23 [2023-12-20 10:08:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:03,569 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-12-20 10:08:03,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-12-20 10:08:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 10:08:03,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:03,572 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:03,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:03,772 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 [2023-12-20 10:08:03,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:03,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:03,773 INFO L85 PathProgramCache]: Analyzing trace with hash -28858623, now seen corresponding path program 5 times [2023-12-20 10:08:03,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:03,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173968364] [2023-12-20 10:08:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:03,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:08:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173968364] [2023-12-20 10:08:03,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173968364] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098338647] [2023-12-20 10:08:03,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:08:03,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:03,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:03,835 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) [2023-12-20 10:08:03,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 10:08:03,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-20 10:08:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:03,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:08:03,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:08:03,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:08:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098338647] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:03,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:03,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 10:08:03,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311709365] [2023-12-20 10:08:03,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 10:08:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 10:08:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:08:03,985 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:04,147 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2023-12-20 10:08:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 10:08:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-20 10:08:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:04,148 INFO L225 Difference]: With dead ends: 111 [2023-12-20 10:08:04,148 INFO L226 Difference]: Without dead ends: 84 [2023-12-20 10:08:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-12-20 10:08:04,149 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:04,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 98 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:08:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-20 10:08:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2023-12-20 10:08:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-12-20 10:08:04,155 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 24 [2023-12-20 10:08:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:04,155 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-12-20 10:08:04,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-12-20 10:08:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:08:04,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:04,156 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] [2023-12-20 10:08:04,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:04,361 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 [2023-12-20 10:08:04,361 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:04,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1849318112, now seen corresponding path program 1 times [2023-12-20 10:08:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:04,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258954582] [2023-12-20 10:08:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:08:04,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258954582] [2023-12-20 10:08:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258954582] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145143617] [2023-12-20 10:08:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:04,651 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) [2023-12-20 10:08:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 10:08:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:04,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 10:08:04,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:04,738 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 [2023-12-20 10:08:04,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:04,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:08:04,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:08:04,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:04,944 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 16 treesize of output 14 [2023-12-20 10:08:04,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 10:08:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:08:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145143617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:04,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:04,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 26 [2023-12-20 10:08:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353948826] [2023-12-20 10:08:04,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 10:08:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 10:08:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-12-20 10:08:04,994 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:05,350 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2023-12-20 10:08:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 10:08:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 10:08:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:05,351 INFO L225 Difference]: With dead ends: 114 [2023-12-20 10:08:05,351 INFO L226 Difference]: Without dead ends: 112 [2023-12-20 10:08:05,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 10:08:05,352 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 112 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:05,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 164 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:08:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-20 10:08:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 79. [2023-12-20 10:08:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2023-12-20 10:08:05,359 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 26 [2023-12-20 10:08:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:05,360 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2023-12-20 10:08:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2023-12-20 10:08:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:08:05,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:05,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:05,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:05,568 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 [2023-12-20 10:08:05,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:05,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2136375899, now seen corresponding path program 2 times [2023-12-20 10:08:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659225305] [2023-12-20 10:08:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:08:05,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659225305] [2023-12-20 10:08:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659225305] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645825150] [2023-12-20 10:08:05,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:08:05,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:05,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:05,643 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) [2023-12-20 10:08:05,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 10:08:05,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:08:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:05,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:08:05,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:08:05,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:08:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645825150] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:05,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 10:08:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624556023] [2023-12-20 10:08:05,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 10:08:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:05,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 10:08:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:08:05,797 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:05,911 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2023-12-20 10:08:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:08:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 10:08:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:05,913 INFO L225 Difference]: With dead ends: 113 [2023-12-20 10:08:05,913 INFO L226 Difference]: Without dead ends: 72 [2023-12-20 10:08:05,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:08:05,914 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:05,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:08:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-20 10:08:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2023-12-20 10:08:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-12-20 10:08:05,920 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 26 [2023-12-20 10:08:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:05,920 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-12-20 10:08:05,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-12-20 10:08:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 10:08:05,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:05,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:05,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:06,126 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 [2023-12-20 10:08:06,126 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:06,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -830047593, now seen corresponding path program 3 times [2023-12-20 10:08:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733562891] [2023-12-20 10:08:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:06,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:06,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733562891] [2023-12-20 10:08:06,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733562891] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:06,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369486027] [2023-12-20 10:08:06,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:08:06,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:06,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:06,585 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) [2023-12-20 10:08:06,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 10:08:06,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 10:08:06,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:06,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-20 10:08:06,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:06,752 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 [2023-12-20 10:08:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:06,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:08:06,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:06,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:08:06,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:06,976 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-20 10:08:06,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2023-12-20 10:08:07,083 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-20 10:08:07,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 44 [2023-12-20 10:08:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:07,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:08,346 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 262 treesize of output 246 [2023-12-20 10:08:08,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:08,394 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 9020578 treesize of output 8703366 [2023-12-20 10:08:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369486027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:09,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:09,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 41 [2023-12-20 10:08:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794314589] [2023-12-20 10:08:09,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:09,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 10:08:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 10:08:09,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 10:08:09,453 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:11,192 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2023-12-20 10:08:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-20 10:08:11,192 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-20 10:08:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:11,193 INFO L225 Difference]: With dead ends: 114 [2023-12-20 10:08:11,193 INFO L226 Difference]: Without dead ends: 112 [2023-12-20 10:08:11,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=791, Invalid=4465, Unknown=0, NotChecked=0, Total=5256 [2023-12-20 10:08:11,195 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:11,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 167 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 10:08:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-20 10:08:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 64. [2023-12-20 10:08:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-12-20 10:08:11,202 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2023-12-20 10:08:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:11,202 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-12-20 10:08:11,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-12-20 10:08:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 10:08:11,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:11,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:11,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-20 10:08:11,407 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 [2023-12-20 10:08:11,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:11,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:11,408 INFO L85 PathProgramCache]: Analyzing trace with hash -34873255, now seen corresponding path program 6 times [2023-12-20 10:08:11,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:11,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120340092] [2023-12-20 10:08:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:11,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 10:08:12,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:12,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120340092] [2023-12-20 10:08:12,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120340092] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:12,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569859525] [2023-12-20 10:08:12,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 10:08:12,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:12,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:12,044 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) [2023-12-20 10:08:12,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 10:08:12,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 10:08:12,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:12,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-20 10:08:12,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:12,157 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 [2023-12-20 10:08:12,163 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 [2023-12-20 10:08:12,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:08:12,216 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-12-20 10:08:12,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2023-12-20 10:08:12,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:12,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:12,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 10:08:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:12,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:12,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 26 [2023-12-20 10:08:12,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:08:12,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:16,584 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 97 treesize of output 91 [2023-12-20 10:08:16,594 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-20 10:08:16,594 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 11178 treesize of output 10410 [2023-12-20 10:08:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:08:16,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569859525] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:16,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 37 [2023-12-20 10:08:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420223633] [2023-12-20 10:08:16,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-20 10:08:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-20 10:08:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1152, Unknown=1, NotChecked=0, Total=1332 [2023-12-20 10:08:16,843 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:17,593 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2023-12-20 10:08:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 10:08:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-20 10:08:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:17,594 INFO L225 Difference]: With dead ends: 154 [2023-12-20 10:08:17,594 INFO L226 Difference]: Without dead ends: 100 [2023-12-20 10:08:17,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=336, Invalid=2015, Unknown=1, NotChecked=0, Total=2352 [2023-12-20 10:08:17,595 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:17,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 149 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 10:08:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-20 10:08:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2023-12-20 10:08:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2023-12-20 10:08:17,610 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 28 [2023-12-20 10:08:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:17,610 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2023-12-20 10:08:17,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2023-12-20 10:08:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 10:08:17,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:17,611 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:17,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:17,816 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 [2023-12-20 10:08:17,816 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:17,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1874432561, now seen corresponding path program 7 times [2023-12-20 10:08:17,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:17,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870383779] [2023-12-20 10:08:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:17,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:08:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870383779] [2023-12-20 10:08:17,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870383779] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182058076] [2023-12-20 10:08:17,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 10:08:17,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:17,902 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) [2023-12-20 10:08:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 10:08:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:17,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 10:08:17,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:08:18,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:08:18,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182058076] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:18,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:18,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 10:08:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363476411] [2023-12-20 10:08:18,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:18,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 10:08:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 10:08:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:08:18,078 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:18,287 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2023-12-20 10:08:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 10:08:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-20 10:08:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:18,287 INFO L225 Difference]: With dead ends: 171 [2023-12-20 10:08:18,288 INFO L226 Difference]: Without dead ends: 120 [2023-12-20 10:08:18,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-12-20 10:08:18,288 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 161 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:18,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 103 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:08:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-20 10:08:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2023-12-20 10:08:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 93 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2023-12-20 10:08:18,300 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 29 [2023-12-20 10:08:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:18,300 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2023-12-20 10:08:18,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2023-12-20 10:08:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 10:08:18,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:18,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:18,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:18,508 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 [2023-12-20 10:08:18,508 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:18,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -581570343, now seen corresponding path program 8 times [2023-12-20 10:08:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109425801] [2023-12-20 10:08:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 10:08:19,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109425801] [2023-12-20 10:08:19,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109425801] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787822609] [2023-12-20 10:08:19,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:08:19,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:19,364 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) [2023-12-20 10:08:19,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 10:08:19,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:08:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:19,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-20 10:08:19,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:19,449 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 [2023-12-20 10:08:19,457 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 [2023-12-20 10:08:19,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:08:19,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:19,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:08:19,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:19,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 10:08:19,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:19,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:19,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:19,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 10:08:19,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:20,079 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 160 treesize of output 152 [2023-12-20 10:08:20,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:20,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1384563 treesize of output 1327219 [2023-12-20 10:08:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 10:08:20,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787822609] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:20,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:20,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2023-12-20 10:08:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207059859] [2023-12-20 10:08:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:20,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-20 10:08:20,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-20 10:08:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 10:08:20,197 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:20,783 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2023-12-20 10:08:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 10:08:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-20 10:08:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:20,784 INFO L225 Difference]: With dead ends: 182 [2023-12-20 10:08:20,784 INFO L226 Difference]: Without dead ends: 145 [2023-12-20 10:08:20,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 10:08:20,786 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:20,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 213 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 10:08:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-20 10:08:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2023-12-20 10:08:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1538461538461537) internal successors, (135), 117 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2023-12-20 10:08:20,803 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 33 [2023-12-20 10:08:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:20,803 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2023-12-20 10:08:20,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2023-12-20 10:08:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 10:08:20,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:20,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:20,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-20 10:08:21,009 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 [2023-12-20 10:08:21,010 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:21,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1397556553, now seen corresponding path program 2 times [2023-12-20 10:08:21,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:21,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524282535] [2023-12-20 10:08:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:21,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:21,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524282535] [2023-12-20 10:08:21,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524282535] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:21,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213287937] [2023-12-20 10:08:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:08:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:21,386 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) [2023-12-20 10:08:21,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 10:08:21,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:08:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:21,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-20 10:08:21,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:21,485 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 [2023-12-20 10:08:21,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:21,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:08:21,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:21,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:08:21,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:21,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:21,766 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 16 treesize of output 14 [2023-12-20 10:08:21,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 10:08:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:08:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213287937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:21,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:21,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 29 [2023-12-20 10:08:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178089757] [2023-12-20 10:08:21,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 10:08:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 10:08:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-12-20 10:08:21,817 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:22,382 INFO L93 Difference]: Finished difference Result 202 states and 229 transitions. [2023-12-20 10:08:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 10:08:22,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 10:08:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:22,384 INFO L225 Difference]: With dead ends: 202 [2023-12-20 10:08:22,384 INFO L226 Difference]: Without dead ends: 175 [2023-12-20 10:08:22,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 10:08:22,385 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:22,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 272 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 10:08:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-20 10:08:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 123. [2023-12-20 10:08:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2295081967213115) internal successors, (150), 122 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2023-12-20 10:08:22,403 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 34 [2023-12-20 10:08:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:22,404 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2023-12-20 10:08:22,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2023-12-20 10:08:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 10:08:22,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:22,404 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:22,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-20 10:08:22,606 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 [2023-12-20 10:08:22,620 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:22,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1635841201, now seen corresponding path program 9 times [2023-12-20 10:08:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:22,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856990216] [2023-12-20 10:08:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:08:22,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:22,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856990216] [2023-12-20 10:08:22,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856990216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:22,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145950314] [2023-12-20 10:08:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:08:22,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:22,770 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) [2023-12-20 10:08:22,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 10:08:22,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 10:08:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:22,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 10:08:22,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:08:22,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:08:23,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145950314] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:23,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:23,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 10:08:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801553175] [2023-12-20 10:08:23,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 10:08:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 10:08:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 10:08:23,019 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:23,252 INFO L93 Difference]: Finished difference Result 309 states and 367 transitions. [2023-12-20 10:08:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 10:08:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 10:08:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:23,253 INFO L225 Difference]: With dead ends: 309 [2023-12-20 10:08:23,253 INFO L226 Difference]: Without dead ends: 219 [2023-12-20 10:08:23,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-20 10:08:23,254 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 169 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:23,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 98 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:08:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-20 10:08:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 176. [2023-12-20 10:08:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 175 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2023-12-20 10:08:23,300 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 34 [2023-12-20 10:08:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:23,300 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2023-12-20 10:08:23,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2023-12-20 10:08:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 10:08:23,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:23,300 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:23,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:23,506 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 [2023-12-20 10:08:23,506 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:23,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash -33184255, now seen corresponding path program 10 times [2023-12-20 10:08:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244057041] [2023-12-20 10:08:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:23,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:08:23,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244057041] [2023-12-20 10:08:23,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244057041] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:23,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359649405] [2023-12-20 10:08:23,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:08:23,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:23,682 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) [2023-12-20 10:08:23,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 10:08:23,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:08:23,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:23,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 10:08:23,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:08:23,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:08:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359649405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:23,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:23,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 10:08:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001441922] [2023-12-20 10:08:23,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:23,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 10:08:23,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 10:08:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 10:08:23,977 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:24,311 INFO L93 Difference]: Finished difference Result 221 states and 250 transitions. [2023-12-20 10:08:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:08:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 10:08:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:24,312 INFO L225 Difference]: With dead ends: 221 [2023-12-20 10:08:24,312 INFO L226 Difference]: Without dead ends: 151 [2023-12-20 10:08:24,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-12-20 10:08:24,313 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:24,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 149 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:08:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-20 10:08:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2023-12-20 10:08:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-12-20 10:08:24,331 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 34 [2023-12-20 10:08:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:24,331 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-12-20 10:08:24,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-12-20 10:08:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 10:08:24,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:24,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:24,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:24,537 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 [2023-12-20 10:08:24,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:24,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2062792791, now seen corresponding path program 4 times [2023-12-20 10:08:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:24,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687079017] [2023-12-20 10:08:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 10:08:25,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:25,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687079017] [2023-12-20 10:08:25,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687079017] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:25,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172579311] [2023-12-20 10:08:25,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:08:25,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:25,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:25,244 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) [2023-12-20 10:08:25,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 10:08:25,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:08:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:25,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-20 10:08:25,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:25,329 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 [2023-12-20 10:08:25,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-20 10:08:25,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-20 10:08:25,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-20 10:08:25,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-12-20 10:08:25,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:25,674 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-12-20 10:08:25,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2023-12-20 10:08:25,709 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-12-20 10:08:25,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2023-12-20 10:08:25,746 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-12-20 10:08:25,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2023-12-20 10:08:25,782 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-12-20 10:08:25,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2023-12-20 10:08:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:08:25,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 10:08:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172579311] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:26,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:26,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 21] total 53 [2023-12-20 10:08:26,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975616908] [2023-12-20 10:08:26,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 10:08:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 10:08:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 10:08:26,953 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:29,880 INFO L93 Difference]: Finished difference Result 238 states and 266 transitions. [2023-12-20 10:08:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-20 10:08:29,881 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-20 10:08:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:29,882 INFO L225 Difference]: With dead ends: 238 [2023-12-20 10:08:29,882 INFO L226 Difference]: Without dead ends: 236 [2023-12-20 10:08:29,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4314 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2143, Invalid=12619, Unknown=0, NotChecked=0, Total=14762 [2023-12-20 10:08:29,885 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 365 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:29,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 559 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 10:08:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-12-20 10:08:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 121. [2023-12-20 10:08:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2023-12-20 10:08:29,906 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 38 [2023-12-20 10:08:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:29,907 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2023-12-20 10:08:29,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2023-12-20 10:08:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 10:08:29,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:29,908 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:29,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 10:08:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:30,113 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:30,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash 147955033, now seen corresponding path program 11 times [2023-12-20 10:08:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144949376] [2023-12-20 10:08:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 10:08:31,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144949376] [2023-12-20 10:08:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144949376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297195560] [2023-12-20 10:08:31,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:08:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:31,214 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:08:31,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 10:08:31,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-20 10:08:31,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:31,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-20 10:08:31,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:31,632 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 [2023-12-20 10:08:31,651 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 [2023-12-20 10:08:31,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-20 10:08:31,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:31,710 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 32 [2023-12-20 10:08:31,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:31,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-20 10:08:31,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:31,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-20 10:08:31,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:31,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:31,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:32,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:32,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:08:32,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:08:33,201 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 236 treesize of output 226 [2023-12-20 10:08:33,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:33,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 622520183 treesize of output 603645815 [2023-12-20 10:08:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:08:33,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297195560] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:08:33,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:08:33,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 56 [2023-12-20 10:08:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000588127] [2023-12-20 10:08:33,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:08:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 10:08:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:08:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 10:08:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2774, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 10:08:33,443 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:08:36,527 INFO L93 Difference]: Finished difference Result 323 states and 378 transitions. [2023-12-20 10:08:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-20 10:08:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-20 10:08:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:08:36,528 INFO L225 Difference]: With dead ends: 323 [2023-12-20 10:08:36,528 INFO L226 Difference]: Without dead ends: 251 [2023-12-20 10:08:36,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3575 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1654, Invalid=13108, Unknown=0, NotChecked=0, Total=14762 [2023-12-20 10:08:36,531 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 10:08:36,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 274 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 10:08:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-20 10:08:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 151. [2023-12-20 10:08:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 150 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2023-12-20 10:08:36,563 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 38 [2023-12-20 10:08:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:08:36,564 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2023-12-20 10:08:36,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 56 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:08:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2023-12-20 10:08:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-20 10:08:36,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:08:36,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:08:36,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-20 10:08:36,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:36,766 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:08:36,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:08:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash 273217762, now seen corresponding path program 3 times [2023-12-20 10:08:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:08:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511702532] [2023-12-20 10:08:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:08:36,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:08:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:08:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 10:08:37,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:08:37,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511702532] [2023-12-20 10:08:37,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511702532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:08:37,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483464760] [2023-12-20 10:08:37,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:08:37,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:08:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:08:37,557 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:08:37,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 10:08:37,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-20 10:08:37,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:08:37,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-20 10:08:37,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:08:37,825 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 [2023-12-20 10:08:37,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:37,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:08:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:37,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:08:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:08:37,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:08:38,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:08:38,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:08:38,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:08:38,143 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-20 10:08:38,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2023-12-20 10:08:38,253 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-20 10:08:38,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 44 [2023-12-20 10:08:38,410 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-20 10:08:38,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 53 [2023-12-20 10:08:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 10:08:38,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:10:07,136 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 976 treesize of output 928