/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:12:40,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:12:40,408 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:12:40,411 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:12:40,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:12:40,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:12:40,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:12:40,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:12:40,439 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:12:40,442 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:12:40,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:12:40,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:12:40,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:12:40,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:12:40,444 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:12:40,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:12:40,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:12:40,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:12:40,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:12:40,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:12:40,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:12:40,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:12:40,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:12:40,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:12:40,446 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:12:40,446 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:12:40,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:12:40,446 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:12:40,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:12:40,447 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:12:40,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:12:40,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:12:40,448 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:12:40,448 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:12:40,449 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:12:40,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:12:40,449 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:12:40,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:12:40,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:12:40,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:12:40,649 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:12:40,649 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:12:40,650 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2023-12-18 18:12:41,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:12:41,776 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:12:41,777 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2023-12-18 18:12:41,782 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee510ddb0/a0472d110f6e471298daea95681bf550/FLAG4e59f3168 [2023-12-18 18:12:41,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee510ddb0/a0472d110f6e471298daea95681bf550 [2023-12-18 18:12:41,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:12:41,801 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:12:41,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:12:41,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:12:41,806 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:12:41,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:41,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9a2154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41, skipping insertion in model container [2023-12-18 18:12:41,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:41,821 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:12:41,930 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i[1544,1557] [2023-12-18 18:12:41,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:12:41,941 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:12:41,960 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i[1544,1557] [2023-12-18 18:12:41,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:12:41,975 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:12:41,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41 WrapperNode [2023-12-18 18:12:41,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:12:41,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:12:41,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:12:41,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:12:41,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:41,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,005 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-12-18 18:12:42,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:12:42,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:12:42,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:12:42,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:12:42,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,019 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,040 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-18 18:12:42,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,051 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:12:42,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:12:42,052 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:12:42,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:12:42,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (1/1) ... [2023-12-18 18:12:42,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:12:42,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:42,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 18:12:42,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 18:12:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:12:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:12:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:12:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 18:12:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:12:42,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:12:42,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:12:42,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:12:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:12:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:12:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-12-18 18:12:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-12-18 18:12:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 18:12:42,154 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:12:42,155 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:12:42,341 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:12:42,360 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:12:42,360 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 18:12:42,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:12:42 BoogieIcfgContainer [2023-12-18 18:12:42,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:12:42,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:12:42,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:12:42,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:12:42,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:12:41" (1/3) ... [2023-12-18 18:12:42,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555d8524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:12:42, skipping insertion in model container [2023-12-18 18:12:42,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:12:41" (2/3) ... [2023-12-18 18:12:42,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555d8524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:12:42, skipping insertion in model container [2023-12-18 18:12:42,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:12:42" (3/3) ... [2023-12-18 18:12:42,367 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum.i [2023-12-18 18:12:42,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:12:42,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:12:42,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:12:42,428 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;@4e0a674e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:12:42,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:12:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 18:12:42,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:42,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:42,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:42,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 538737317, now seen corresponding path program 1 times [2023-12-18 18:12:42,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798346235] [2023-12-18 18:12:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:42,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:42,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798346235] [2023-12-18 18:12:42,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-18 18:12:42,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609223244] [2023-12-18 18:12:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:42,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:42,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:42,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:12:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:42,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-18 18:12:42,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:12:42,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:12:42,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609223244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:12:42,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:12:42,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:12:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126309509] [2023-12-18 18:12:42,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:12:42,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:12:42,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:12:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:12:42,731 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:12:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:42,777 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2023-12-18 18:12:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:12:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-12-18 18:12:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:42,782 INFO L225 Difference]: With dead ends: 47 [2023-12-18 18:12:42,782 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 18:12:42,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:12:42,787 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:42,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 18:12:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-18 18:12:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-18 18:12:42,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 29 [2023-12-18 18:12:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:42,814 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-18 18:12:42,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:12:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-18 18:12:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 18:12:42,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:42,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:42,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 18:12:43,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-18 18:12:43,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:43,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 596589422, now seen corresponding path program 1 times [2023-12-18 18:12:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:43,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658117270] [2023-12-18 18:12:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:43,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658117270] [2023-12-18 18:12:43,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-18 18:12:43,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083018697] [2023-12-18 18:12:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:43,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:43,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:43,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:12:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 18:12:43,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 18:12:43,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 18:12:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083018697] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:12:43,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:12:43,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:12:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308650884] [2023-12-18 18:12:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:12:43,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:12:43,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:12:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:12:43,170 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:12:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:43,185 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2023-12-18 18:12:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:12:43,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-18 18:12:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:43,188 INFO L225 Difference]: With dead ends: 45 [2023-12-18 18:12:43,188 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 18:12:43,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:12:43,190 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:43,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 18:12:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-12-18 18:12:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-12-18 18:12:43,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2023-12-18 18:12:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:43,197 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-12-18 18:12:43,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:12:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-12-18 18:12:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 18:12:43,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:43,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:43,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:43,402 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,SelfDestructingSolverStorable1 [2023-12-18 18:12:43,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:43,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash 94714093, now seen corresponding path program 1 times [2023-12-18 18:12:43,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:43,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447511806] [2023-12-18 18:12:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 18:12:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:12:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-18 18:12:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:12:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447511806] [2023-12-18 18:12:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447511806] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:12:43,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:12:43,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:12:43,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557177760] [2023-12-18 18:12:43,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:12:43,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:12:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:12:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:12:43,524 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:12:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:43,545 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2023-12-18 18:12:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:12:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-12-18 18:12:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:43,546 INFO L225 Difference]: With dead ends: 50 [2023-12-18 18:12:43,546 INFO L226 Difference]: Without dead ends: 27 [2023-12-18 18:12:43,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:12:43,547 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:43,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-18 18:12:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-18 18:12:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-12-18 18:12:43,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 29 [2023-12-18 18:12:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:43,551 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-12-18 18:12:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 18:12:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-12-18 18:12:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 18:12:43,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:43,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:43,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 18:12:43,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:43,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash 241166801, now seen corresponding path program 1 times [2023-12-18 18:12:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:43,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509323875] [2023-12-18 18:12:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-12-18 18:12:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-12-18 18:12:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:12:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:12:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509323875] [2023-12-18 18:12:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509323875] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:12:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863925880] [2023-12-18 18:12:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:43,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:43,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:43,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:12:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:43,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 18:12:43,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:12:43,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:12:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:12:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863925880] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:12:43,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:12:43,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-12-18 18:12:43,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190898061] [2023-12-18 18:12:43,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:12:43,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 18:12:43,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:43,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 18:12:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:12:43,821 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 18:12:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:43,896 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-12-18 18:12:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 18:12:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 30 [2023-12-18 18:12:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:43,899 INFO L225 Difference]: With dead ends: 54 [2023-12-18 18:12:43,900 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:12:43,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-18 18:12:43,902 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:43,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 52 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:12:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-12-18 18:12:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-12-18 18:12:43,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 30 [2023-12-18 18:12:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:43,917 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-12-18 18:12:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 18:12:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-12-18 18:12:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:12:43,917 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:43,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:43,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:44,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:44,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:44,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash 843711203, now seen corresponding path program 1 times [2023-12-18 18:12:44,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:44,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823662100] [2023-12-18 18:12:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:44,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:12:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:12:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 18:12:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 18:12:44,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823662100] [2023-12-18 18:12:44,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823662100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:12:44,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:12:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 18:12:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798640824] [2023-12-18 18:12:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:12:44,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 18:12:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 18:12:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:12:44,275 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:12:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:44,304 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-12-18 18:12:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 18:12:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-12-18 18:12:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:44,305 INFO L225 Difference]: With dead ends: 50 [2023-12-18 18:12:44,306 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:12:44,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:12:44,306 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:44,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:12:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-18 18:12:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-18 18:12:44,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 40 [2023-12-18 18:12:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:44,316 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-18 18:12:44,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 18:12:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-18 18:12:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 18:12:44,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:44,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:44,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-18 18:12:44,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:44,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash -431388978, now seen corresponding path program 1 times [2023-12-18 18:12:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316189534] [2023-12-18 18:12:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:12:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:12:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 18:12:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-18 18:12:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316189534] [2023-12-18 18:12:44,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316189534] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:12:44,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:12:44,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-18 18:12:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325088019] [2023-12-18 18:12:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:12:44,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 18:12:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 18:12:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:12:44,568 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:44,643 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2023-12-18 18:12:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 18:12:44,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-12-18 18:12:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:44,646 INFO L225 Difference]: With dead ends: 57 [2023-12-18 18:12:44,647 INFO L226 Difference]: Without dead ends: 53 [2023-12-18 18:12:44,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-18 18:12:44,648 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:44,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 185 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-18 18:12:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2023-12-18 18:12:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-18 18:12:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2023-12-18 18:12:44,662 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 41 [2023-12-18 18:12:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:44,664 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2023-12-18 18:12:44,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 18:12:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2023-12-18 18:12:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 18:12:44,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:44,665 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-18 18:12:44,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:44,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1018748469, now seen corresponding path program 1 times [2023-12-18 18:12:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:44,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473188161] [2023-12-18 18:12:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:44,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 18:12:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089563294] [2023-12-18 18:12:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:44,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:44,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:44,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:12:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:12:44,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 18:12:44,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 18:12:44,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:12:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-18 18:12:44,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473188161] [2023-12-18 18:12:44,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 18:12:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089563294] [2023-12-18 18:12:44,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089563294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:12:44,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 18:12:44,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-12-18 18:12:44,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547216065] [2023-12-18 18:12:44,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 18:12:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 18:12:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 18:12:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-18 18:12:44,898 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:12:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:44,973 INFO L93 Difference]: Finished difference Result 77 states and 113 transitions. [2023-12-18 18:12:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 18:12:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-12-18 18:12:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:44,975 INFO L225 Difference]: With dead ends: 77 [2023-12-18 18:12:44,976 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 18:12:44,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:12:44,979 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:44,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 63 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:12:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 18:12:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-12-18 18:12:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-18 18:12:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2023-12-18 18:12:44,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 44 [2023-12-18 18:12:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:44,994 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2023-12-18 18:12:44,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:12:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2023-12-18 18:12:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-18 18:12:44,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:44,995 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:45,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:45,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:45,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:45,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1731959157, now seen corresponding path program 2 times [2023-12-18 18:12:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:45,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544395610] [2023-12-18 18:12:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:45,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 18:12:45,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750398160] [2023-12-18 18:12:45,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:12:45,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:45,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:45,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:45,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:12:45,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:12:45,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:12:45,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 18:12:45,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-18 18:12:45,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:12:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-18 18:12:45,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:45,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544395610] [2023-12-18 18:12:45,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 18:12:45,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750398160] [2023-12-18 18:12:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750398160] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:12:45,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 18:12:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2023-12-18 18:12:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777589450] [2023-12-18 18:12:45,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 18:12:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 18:12:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 18:12:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-18 18:12:45,466 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:12:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:45,552 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2023-12-18 18:12:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 18:12:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2023-12-18 18:12:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:45,553 INFO L225 Difference]: With dead ends: 118 [2023-12-18 18:12:45,553 INFO L226 Difference]: Without dead ends: 62 [2023-12-18 18:12:45,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-12-18 18:12:45,554 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:45,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 103 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:12:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-18 18:12:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-18 18:12:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.196078431372549) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-18 18:12:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2023-12-18 18:12:45,561 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 53 [2023-12-18 18:12:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:45,561 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2023-12-18 18:12:45,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:12:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2023-12-18 18:12:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 18:12:45,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:45,562 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:45,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:45,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:45,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:45,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:45,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2089571473, now seen corresponding path program 3 times [2023-12-18 18:12:45,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:45,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442418396] [2023-12-18 18:12:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:45,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:45,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 18:12:45,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989478642] [2023-12-18 18:12:45,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:12:45,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:45,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:45,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:45,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:12:45,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 18:12:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:12:45,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 18:12:45,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 18:12:45,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:12:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-18 18:12:45,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442418396] [2023-12-18 18:12:45,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 18:12:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989478642] [2023-12-18 18:12:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989478642] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:12:45,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 18:12:45,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-18 18:12:45,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466864704] [2023-12-18 18:12:45,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 18:12:45,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-18 18:12:45,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-18 18:12:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-18 18:12:45,946 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:12:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:45,983 INFO L93 Difference]: Finished difference Result 104 states and 133 transitions. [2023-12-18 18:12:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 18:12:45,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2023-12-18 18:12:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:45,984 INFO L225 Difference]: With dead ends: 104 [2023-12-18 18:12:45,984 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 18:12:45,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-18 18:12:45,985 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:45,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 60 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:12:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 18:12:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-18 18:12:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 55 states have internal predecessors, (64), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-18 18:12:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2023-12-18 18:12:45,991 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 54 [2023-12-18 18:12:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:45,991 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2023-12-18 18:12:45,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 18:12:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2023-12-18 18:12:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 18:12:45,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:45,992 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:45,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:46,200 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:46,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1776933820, now seen corresponding path program 4 times [2023-12-18 18:12:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829525682] [2023-12-18 18:12:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:46,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 18:12:46,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681004488] [2023-12-18 18:12:46,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:12:46,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:46,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:46,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:12:46,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:12:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:12:46,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 18:12:46,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:12:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 18:12:46,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:12:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 5 proven. 86 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 18:12:46,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:12:46,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829525682] [2023-12-18 18:12:46,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 18:12:46,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681004488] [2023-12-18 18:12:46,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681004488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:12:46,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 18:12:46,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2023-12-18 18:12:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359192508] [2023-12-18 18:12:46,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 18:12:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 18:12:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:12:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 18:12:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-18 18:12:46,467 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-18 18:12:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:12:46,677 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2023-12-18 18:12:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 18:12:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2023-12-18 18:12:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:12:46,679 INFO L225 Difference]: With dead ends: 117 [2023-12-18 18:12:46,679 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 18:12:46,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:12:46,679 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:12:46,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 132 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:12:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 18:12:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2023-12-18 18:12:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-18 18:12:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-12-18 18:12:46,688 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 55 [2023-12-18 18:12:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:12:46,688 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-12-18 18:12:46,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-18 18:12:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-12-18 18:12:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 18:12:46,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:12:46,689 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:46,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:46,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:46,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:12:46,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:12:46,895 INFO L85 PathProgramCache]: Analyzing trace with hash -975500740, now seen corresponding path program 1 times [2023-12-18 18:12:46,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:12:46,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528866748] [2023-12-18 18:12:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:46,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:12:46,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 18:12:46,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470848909] [2023-12-18 18:12:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:12:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:12:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:12:46,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:12:46,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:12:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 18:12:47,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-18 18:12:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 18:12:47,099 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-18 18:12:47,099 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-18 18:12:47,100 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:12:47,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 18:12:47,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 18:12:47,304 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:12:47,306 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:12:47,325 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-18 18:12:47,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:12:47 BoogieIcfgContainer [2023-12-18 18:12:47,338 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:12:47,338 INFO L158 Benchmark]: Toolchain (without parser) took 5537.21ms. Allocated memory was 205.5MB in the beginning and 311.4MB in the end (delta: 105.9MB). Free memory was 163.9MB in the beginning and 239.2MB in the end (delta: -75.3MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. [2023-12-18 18:12:47,338 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 205.5MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:12:47,338 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.92ms. Allocated memory is still 205.5MB. Free memory was 163.5MB in the beginning and 152.3MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 18:12:47,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.51ms. Allocated memory is still 205.5MB. Free memory was 152.3MB in the beginning and 150.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 18:12:47,339 INFO L158 Benchmark]: Boogie Preprocessor took 43.99ms. Allocated memory is still 205.5MB. Free memory was 150.6MB in the beginning and 148.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:12:47,339 INFO L158 Benchmark]: RCFGBuilder took 308.56ms. Allocated memory is still 205.5MB. Free memory was 148.5MB in the beginning and 134.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 18:12:47,339 INFO L158 Benchmark]: TraceAbstraction took 4975.30ms. Allocated memory was 205.5MB in the beginning and 311.4MB in the end (delta: 105.9MB). Free memory was 134.2MB in the beginning and 239.2MB in the end (delta: -105.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:12:47,340 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 205.5MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.92ms. Allocated memory is still 205.5MB. Free memory was 163.5MB in the beginning and 152.3MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.51ms. Allocated memory is still 205.5MB. Free memory was 152.3MB in the beginning and 150.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.99ms. Allocated memory is still 205.5MB. Free memory was 150.6MB in the beginning and 148.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 308.56ms. Allocated memory is still 205.5MB. Free memory was 148.5MB in the beginning and 134.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 4975.30ms. Allocated memory was 205.5MB in the beginning and 311.4MB in the end (delta: 105.9MB). Free memory was 134.2MB in the beginning and 239.2MB in the end (delta: -105.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L46] CALL init_nondet(x) [L17] int i; [L18] i = 0 VAL [N=3, i=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3, i=1, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3, i=2, x={3:0}, x={3:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3, i=3, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [N=3, i=3, x={3:0}, x={3:0}] [L46] RET init_nondet(x) [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; VAL [N=3, x={3:0}] [L52] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3, cnt=1, i=2, ret=4, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=1, i=3, ret=4, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [N=3, cnt=1, i=3, ret=4, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3, \result=4, cnt=1, i=3, ret=4, x={3:0}, x={3:0}] [L52] RET, EXPR rangesum(x) VAL [N=3, x={3:0}] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp VAL [N=3] [L55] CALL, EXPR rangesum(x) VAL [N=3, x={3:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3, cnt=1, i=2, ret=4, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=1, i=3, ret=4, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [N=3, cnt=1, i=3, ret=4, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3, \result=4, cnt=1, i=3, ret=4, x={3:0}, x={3:0}] [L55] RET, EXPR rangesum(x) VAL [N=3, ret=4, temp=2, x={3:0}] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [N=3, i=0, ret2=4, ret=4, temp=3, x={3:0}] [L57] COND TRUE i N/2) VAL [N=3, cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L30] COND FALSE !(i > N/2) VAL [N=3, cnt=0, i=1, ret=0, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L29] COND TRUE i < N VAL [N=3, cnt=0, i=2, ret=0, x={3:0}, x={3:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3, cnt=1, i=2, ret=3, x={3:0}, x={3:0}] [L29] i++ VAL [N=3, cnt=1, i=3, ret=3, x={3:0}, x={3:0}] [L29] COND FALSE !(i < N) VAL [N=3, cnt=1, i=3, ret=3, x={3:0}, x={3:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3, \result=3, cnt=1, i=3, ret=3, x={3:0}, x={3:0}] [L61] RET, EXPR rangesum(x) VAL [N=3, ret2=4, ret=4, temp=3, x={3:0}] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3, ret2=4, ret5=3, ret=4, temp=3, x={3:0}] [L64] reach_error() VAL [N=3, ret2=4, ret5=3, ret=4, temp=3, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 183 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 173 mSDsluCounter, 737 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 509 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 736 IncrementalHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 228 mSDtfsCounter, 736 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 587 GetRequests, 502 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=9, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 553 NumberOfCodeBlocks, 525 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 1292 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1120 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 694/898 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-18 18:12:47,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...