/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/ifeqn2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:24:15,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:24:15,778 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:24:15,782 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:24:15,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:24:15,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:24:15,804 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:24:15,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:24:15,805 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:24:15,808 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:24:15,808 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:24:15,809 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:24:15,809 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:24:15,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:24:15,810 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:24:15,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:24:15,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:24:15,810 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:24:15,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:24:15,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:24:15,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:24:15,812 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:24:15,812 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:24:15,812 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:24:15,812 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:24:15,813 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:24:15,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:24:15,813 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:24:15,813 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:24:15,814 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:24:15,814 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:24:15,814 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:24:15,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:24:15,815 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:24:15,815 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:24:15,816 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:24:15,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:24:15,816 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:24:16,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:24:16,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:24:16,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:24:16,040 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:24:16,040 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:24:16,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn2.c [2023-12-16 00:24:17,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:24:17,205 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:24:17,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn2.c [2023-12-16 00:24:17,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0faa64c/e9c5d16d890b48bdb8f4143dcf2834be/FLAG5f5c4a5b3 [2023-12-16 00:24:17,228 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0faa64c/e9c5d16d890b48bdb8f4143dcf2834be [2023-12-16 00:24:17,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:24:17,231 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:24:17,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:24:17,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:24:17,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:24:17,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252e5b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17, skipping insertion in model container [2023-12-16 00:24:17,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:24:17,368 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn2.c[589,602] [2023-12-16 00:24:17,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:24:17,388 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:24:17,396 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn2.c[589,602] [2023-12-16 00:24:17,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:24:17,411 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:24:17,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17 WrapperNode [2023-12-16 00:24:17,412 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:24:17,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:24:17,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:24:17,413 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:24:17,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,442 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-12-16 00:24:17,442 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:24:17,442 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:24:17,443 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:24:17,443 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:24:17,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,452 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,466 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2023-12-16 00:24:17,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:24:17,477 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:24:17,477 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:24:17,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:24:17,478 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (1/1) ... [2023-12-16 00:24:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:24:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:17,504 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) [2023-12-16 00:24:17,524 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 [2023-12-16 00:24:17,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:24:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:24:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 00:24:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 00:24:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 00:24:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 00:24:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 00:24:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-16 00:24:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:24:17,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:24:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 00:24:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 00:24:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 00:24:17,587 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:24:17,589 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:24:17,737 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:24:17,750 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:24:17,751 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-16 00:24:17,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:24:17 BoogieIcfgContainer [2023-12-16 00:24:17,751 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:24:17,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:24:17,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:24:17,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:24:17,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:24:17" (1/3) ... [2023-12-16 00:24:17,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c54bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:24:17, skipping insertion in model container [2023-12-16 00:24:17,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:24:17" (2/3) ... [2023-12-16 00:24:17,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c54bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:24:17, skipping insertion in model container [2023-12-16 00:24:17,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:24:17" (3/3) ... [2023-12-16 00:24:17,761 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2023-12-16 00:24:17,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:24:17,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 00:24:17,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:24:17,810 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;@2076e884, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:24:17,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 00:24:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-16 00:24:17,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:17,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:17,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:17,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash 323884275, now seen corresponding path program 1 times [2023-12-16 00:24:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:17,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102245966] [2023-12-16 00:24:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:17,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:17,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102245966] [2023-12-16 00:24:17,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-16 00:24:17,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135120144] [2023-12-16 00:24:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:17,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:17,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:17,956 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) [2023-12-16 00:24:17,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:24:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:18,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-16 00:24:18,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:18,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:24:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135120144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:24:18,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:24:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 00:24:18,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124725266] [2023-12-16 00:24:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:24:18,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 00:24:18,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 00:24:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:24:18,048 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:18,069 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-12-16 00:24:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 00:24:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-16 00:24:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:18,075 INFO L225 Difference]: With dead ends: 37 [2023-12-16 00:24:18,076 INFO L226 Difference]: Without dead ends: 17 [2023-12-16 00:24:18,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:24:18,080 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:18,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:24:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-16 00:24:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-16 00:24:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-16 00:24:18,101 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-12-16 00:24:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:18,101 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-16 00:24:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-16 00:24:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-16 00:24:18,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:18,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:18,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-16 00:24:18,304 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 [2023-12-16 00:24:18,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:18,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash 993783914, now seen corresponding path program 1 times [2023-12-16 00:24:18,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478997314] [2023-12-16 00:24:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:18,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:18,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478997314] [2023-12-16 00:24:18,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-16 00:24:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788819238] [2023-12-16 00:24:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:18,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:18,362 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) [2023-12-16 00:24:18,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:24:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:18,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-16 00:24:18,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:18,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:24:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788819238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:24:18,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:24:18,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 00:24:18,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785096776] [2023-12-16 00:24:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:24:18,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:24:18,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:24:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:24:18,456 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:18,500 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-16 00:24:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:24:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-16 00:24:18,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:18,502 INFO L225 Difference]: With dead ends: 38 [2023-12-16 00:24:18,502 INFO L226 Difference]: Without dead ends: 28 [2023-12-16 00:24:18,502 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 [2023-12-16 00:24:18,504 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:18,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:24:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-16 00:24:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-12-16 00:24:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-16 00:24:18,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-12-16 00:24:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:18,515 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-16 00:24:18,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-16 00:24:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-16 00:24:18,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:18,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:18,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:18,720 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 [2023-12-16 00:24:18,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:18,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 334138833, now seen corresponding path program 1 times [2023-12-16 00:24:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:18,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336420731] [2023-12-16 00:24:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:18,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:18,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308217238] [2023-12-16 00:24:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:18,740 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) [2023-12-16 00:24:18,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:24:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:18,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-16 00:24:18,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:18,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:24:18,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:24:18,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336420731] [2023-12-16 00:24:18,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:18,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308217238] [2023-12-16 00:24:18,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308217238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:24:18,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:24:18,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:24:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336372461] [2023-12-16 00:24:18,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:24:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:24:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:24:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:24:18,876 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:18,931 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-12-16 00:24:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:24:18,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-16 00:24:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:18,932 INFO L225 Difference]: With dead ends: 33 [2023-12-16 00:24:18,932 INFO L226 Difference]: Without dead ends: 31 [2023-12-16 00:24:18,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-16 00:24:18,935 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:18,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:24:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-16 00:24:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-12-16 00:24:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-12-16 00:24:18,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2023-12-16 00:24:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:18,948 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-12-16 00:24:18,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-12-16 00:24:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-16 00:24:18,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:18,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:18,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:19,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:19,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:19,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2109146195, now seen corresponding path program 1 times [2023-12-16 00:24:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740899614] [2023-12-16 00:24:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:19,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:19,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566664990] [2023-12-16 00:24:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:19,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:19,184 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) [2023-12-16 00:24:19,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:24:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:19,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-16 00:24:19,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:24:19,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:24:19,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740899614] [2023-12-16 00:24:19,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566664990] [2023-12-16 00:24:19,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566664990] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:24:19,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:24:19,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:24:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986361644] [2023-12-16 00:24:19,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:24:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:24:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:24:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:24:19,245 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:19,274 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-12-16 00:24:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:24:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-16 00:24:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:19,276 INFO L225 Difference]: With dead ends: 51 [2023-12-16 00:24:19,277 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 00:24:19,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:24:19,280 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:19,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:24:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 00:24:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-12-16 00:24:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-12-16 00:24:19,288 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2023-12-16 00:24:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:19,288 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-12-16 00:24:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-12-16 00:24:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-16 00:24:19,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:19,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:19,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-16 00:24:19,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:19,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:19,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:19,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1399034495, now seen corresponding path program 1 times [2023-12-16 00:24:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:19,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488497098] [2023-12-16 00:24:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:19,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:19,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116591277] [2023-12-16 00:24:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:19,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:19,512 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) [2023-12-16 00:24:19,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:24:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:19,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 00:24:19,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:24:19,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:24:19,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:19,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488497098] [2023-12-16 00:24:19,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:19,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116591277] [2023-12-16 00:24:19,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116591277] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:19,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:19,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-16 00:24:19,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350210891] [2023-12-16 00:24:19,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:19,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-16 00:24:19,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-16 00:24:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:24:19,689 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:19,821 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-12-16 00:24:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 00:24:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-16 00:24:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:19,823 INFO L225 Difference]: With dead ends: 64 [2023-12-16 00:24:19,823 INFO L226 Difference]: Without dead ends: 39 [2023-12-16 00:24:19,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-16 00:24:19,825 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:19,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:24:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-16 00:24:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2023-12-16 00:24:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-16 00:24:19,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-12-16 00:24:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:19,830 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-16 00:24:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-16 00:24:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-16 00:24:19,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:19,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:19,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:20,032 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:20,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1256903054, now seen corresponding path program 1 times [2023-12-16 00:24:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:20,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992393723] [2023-12-16 00:24:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:20,055 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325223082] [2023-12-16 00:24:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:20,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:20,064 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) [2023-12-16 00:24:20,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:24:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:20,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-16 00:24:20,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:20,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:20,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-12-16 00:24:20,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-16 00:24:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:20,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:20,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:20,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 163 [2023-12-16 00:24:20,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-12-16 00:24:20,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-16 00:24:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:24:20,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992393723] [2023-12-16 00:24:20,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325223082] [2023-12-16 00:24:20,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325223082] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:20,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:20,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-12-16 00:24:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946770382] [2023-12-16 00:24:20,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:20,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-16 00:24:20,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-16 00:24:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-12-16 00:24:20,624 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:21,033 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2023-12-16 00:24:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-16 00:24:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-16 00:24:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:21,034 INFO L225 Difference]: With dead ends: 101 [2023-12-16 00:24:21,034 INFO L226 Difference]: Without dead ends: 82 [2023-12-16 00:24:21,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2023-12-16 00:24:21,035 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 120 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:21,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 95 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:24:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-16 00:24:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2023-12-16 00:24:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-12-16 00:24:21,040 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2023-12-16 00:24:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:21,040 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-12-16 00:24:21,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-12-16 00:24:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-16 00:24:21,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:21,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:21,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-16 00:24:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:21,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:21,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 879178916, now seen corresponding path program 1 times [2023-12-16 00:24:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:21,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602787635] [2023-12-16 00:24:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:21,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:21,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:21,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224231634] [2023-12-16 00:24:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:21,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:21,265 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) [2023-12-16 00:24:21,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:24:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:24:21,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-16 00:24:21,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:21,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:21,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-16 00:24:21,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:21,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 00:24:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:21,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:21,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-12-16 00:24:21,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:21,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 73 [2023-12-16 00:24:22,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-16 00:24:22,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-12-16 00:24:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:22,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:22,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602787635] [2023-12-16 00:24:22,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:22,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224231634] [2023-12-16 00:24:22,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224231634] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:22,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:22,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-12-16 00:24:22,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100802161] [2023-12-16 00:24:22,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:22,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-16 00:24:22,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:22,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-16 00:24:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-12-16 00:24:22,037 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:25,421 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2023-12-16 00:24:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-16 00:24:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-16 00:24:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:25,423 INFO L225 Difference]: With dead ends: 225 [2023-12-16 00:24:25,423 INFO L226 Difference]: Without dead ends: 223 [2023-12-16 00:24:25,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1124, Invalid=4576, Unknown=0, NotChecked=0, Total=5700 [2023-12-16 00:24:25,425 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 506 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:25,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 165 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-16 00:24:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-16 00:24:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 99. [2023-12-16 00:24:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2023-12-16 00:24:25,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 26 [2023-12-16 00:24:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:25,447 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2023-12-16 00:24:25,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2023-12-16 00:24:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-16 00:24:25,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:25,448 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:25,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:25,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:25,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:25,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash 913699278, now seen corresponding path program 2 times [2023-12-16 00:24:25,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:25,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274858931] [2023-12-16 00:24:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:25,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:25,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:25,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954742606] [2023-12-16 00:24:25,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:24:25,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:25,667 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) [2023-12-16 00:24:25,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 00:24:25,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:24:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:24:25,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 00:24:25,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:24:25,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:24:25,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:25,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274858931] [2023-12-16 00:24:25,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:25,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954742606] [2023-12-16 00:24:25,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954742606] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:25,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:25,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-16 00:24:25,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129554619] [2023-12-16 00:24:25,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:25,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 00:24:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 00:24:25,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-16 00:24:25,826 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:25,943 INFO L93 Difference]: Finished difference Result 195 states and 239 transitions. [2023-12-16 00:24:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 00:24:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-16 00:24:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:25,945 INFO L225 Difference]: With dead ends: 195 [2023-12-16 00:24:25,945 INFO L226 Difference]: Without dead ends: 124 [2023-12-16 00:24:25,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-16 00:24:25,945 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:25,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 44 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:24:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-16 00:24:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2023-12-16 00:24:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.25) internal successors, (130), 104 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 130 transitions. [2023-12-16 00:24:25,958 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 130 transitions. Word has length 29 [2023-12-16 00:24:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:25,958 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 130 transitions. [2023-12-16 00:24:25,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 130 transitions. [2023-12-16 00:24:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-16 00:24:25,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:25,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:25,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:26,173 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,SelfDestructingSolverStorable7 [2023-12-16 00:24:26,173 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:26,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1445040975, now seen corresponding path program 3 times [2023-12-16 00:24:26,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:26,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755008330] [2023-12-16 00:24:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:26,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:26,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:26,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797673457] [2023-12-16 00:24:26,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:24:26,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:26,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:26,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:24:26,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-16 00:24:26,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-16 00:24:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:24:26,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-16 00:24:26,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:26,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:26,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 00:24:26,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:26,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-16 00:24:26,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:26,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 00:24:26,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:26,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-16 00:24:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:27,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:27,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2023-12-16 00:24:27,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:27,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 265 treesize of output 247 [2023-12-16 00:24:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:28,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755008330] [2023-12-16 00:24:28,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797673457] [2023-12-16 00:24:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797673457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:28,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:28,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-12-16 00:24:28,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902898761] [2023-12-16 00:24:28,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-16 00:24:28,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-16 00:24:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1646, Unknown=0, NotChecked=0, Total=2070 [2023-12-16 00:24:28,349 INFO L87 Difference]: Start difference. First operand 105 states and 130 transitions. Second operand has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:35,991 INFO L93 Difference]: Finished difference Result 275 states and 331 transitions. [2023-12-16 00:24:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-16 00:24:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-16 00:24:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:35,992 INFO L225 Difference]: With dead ends: 275 [2023-12-16 00:24:35,992 INFO L226 Difference]: Without dead ends: 154 [2023-12-16 00:24:35,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2126, Invalid=7576, Unknown=0, NotChecked=0, Total=9702 [2023-12-16 00:24:35,994 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 397 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:35,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 103 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-16 00:24:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-16 00:24:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 122. [2023-12-16 00:24:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 121 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2023-12-16 00:24:36,038 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 35 [2023-12-16 00:24:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:36,038 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2023-12-16 00:24:36,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2023-12-16 00:24:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-16 00:24:36,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:36,039 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:36,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:36,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:36,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:36,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1993895340, now seen corresponding path program 4 times [2023-12-16 00:24:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:36,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842801687] [2023-12-16 00:24:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:36,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:36,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:36,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453508533] [2023-12-16 00:24:36,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:24:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:36,274 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:24:36,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-16 00:24:36,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:24:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:24:36,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 00:24:36,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:24:36,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:24:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842801687] [2023-12-16 00:24:36,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:36,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453508533] [2023-12-16 00:24:36,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453508533] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:36,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:36,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2023-12-16 00:24:36,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545657380] [2023-12-16 00:24:36,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:36,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 00:24:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:36,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 00:24:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-16 00:24:36,441 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:36,739 INFO L93 Difference]: Finished difference Result 234 states and 277 transitions. [2023-12-16 00:24:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-16 00:24:36,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-16 00:24:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:36,740 INFO L225 Difference]: With dead ends: 234 [2023-12-16 00:24:36,740 INFO L226 Difference]: Without dead ends: 118 [2023-12-16 00:24:36,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2023-12-16 00:24:36,741 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:36,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 113 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:24:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-16 00:24:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2023-12-16 00:24:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-12-16 00:24:36,755 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 35 [2023-12-16 00:24:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:36,755 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-12-16 00:24:36,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-12-16 00:24:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 00:24:36,756 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:36,756 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:36,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-16 00:24:36,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:36,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -675922039, now seen corresponding path program 2 times [2023-12-16 00:24:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321043776] [2023-12-16 00:24:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:36,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:36,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315828525] [2023-12-16 00:24:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:24:36,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:36,979 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:24:36,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-16 00:24:37,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:24:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:24:37,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 00:24:37,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:37,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321043776] [2023-12-16 00:24:37,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315828525] [2023-12-16 00:24:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315828525] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:37,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-16 00:24:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141206765] [2023-12-16 00:24:37,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 00:24:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 00:24:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-16 00:24:37,209 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:24:37,409 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2023-12-16 00:24:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-16 00:24:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-16 00:24:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:24:37,410 INFO L225 Difference]: With dead ends: 133 [2023-12-16 00:24:37,410 INFO L226 Difference]: Without dead ends: 102 [2023-12-16 00:24:37,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2023-12-16 00:24:37,410 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:24:37,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:24:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-16 00:24:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2023-12-16 00:24:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-12-16 00:24:37,424 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 38 [2023-12-16 00:24:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:24:37,424 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-12-16 00:24:37,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:24:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-12-16 00:24:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-16 00:24:37,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:24:37,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:24:37,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-16 00:24:37,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-16 00:24:37,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:24:37,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:24:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 475806958, now seen corresponding path program 5 times [2023-12-16 00:24:37,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:24:37,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464764335] [2023-12-16 00:24:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:24:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:24:37,643 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:24:37,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520834757] [2023-12-16 00:24:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:24:37,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:24:37,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:24:37,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:24:37,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-16 00:24:38,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-16 00:24:38,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:24:38,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-16 00:24:38,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:24:38,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:38,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 00:24:38,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:38,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-16 00:24:38,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:38,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-16 00:24:38,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:24:38,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-16 00:24:38,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:38,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-16 00:24:38,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:38,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-16 00:24:38,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:24:38,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 16 [2023-12-16 00:24:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:38,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:24:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:24:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:24:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464764335] [2023-12-16 00:24:43,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:24:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520834757] [2023-12-16 00:24:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520834757] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:24:43,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:24:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2023-12-16 00:24:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102834747] [2023-12-16 00:24:43,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:24:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-16 00:24:43,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:24:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-16 00:24:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2023-12-16 00:24:43,824 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 40 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-16 00:25:31,873 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:25:31,877 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:25:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-16 00:25:31,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=1369, Invalid=6463, Unknown=0, NotChecked=0, Total=7832 [2023-12-16 00:25:31,981 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 681 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-16 00:25:31,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 244 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-12-16 00:25:31,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 00:25:31,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-16 00:25:32,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-16 00:25:32,189 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (69states) and FLOYD_HOARE automaton (currently 64 states, 40 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 89 known predicates. [2023-12-16 00:25:32,194 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1] [2023-12-16 00:25:32,196 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 00:25:32,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:25:32 BoogieIcfgContainer [2023-12-16 00:25:32,199 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 00:25:32,199 INFO L158 Benchmark]: Toolchain (without parser) took 74967.73ms. Allocated memory was 311.4MB in the beginning and 474.0MB in the end (delta: 162.5MB). Free memory was 257.9MB in the beginning and 172.5MB in the end (delta: 85.4MB). Peak memory consumption was 249.5MB. Max. memory is 8.0GB. [2023-12-16 00:25:32,199 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 200.3MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:25:32,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.25ms. Allocated memory is still 311.4MB. Free memory was 257.9MB in the beginning and 246.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 00:25:32,201 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.62ms. Allocated memory is still 311.4MB. Free memory was 246.4MB in the beginning and 244.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:25:32,201 INFO L158 Benchmark]: Boogie Preprocessor took 34.44ms. Allocated memory is still 311.4MB. Free memory was 244.8MB in the beginning and 242.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:25:32,201 INFO L158 Benchmark]: RCFGBuilder took 274.20ms. Allocated memory is still 311.4MB. Free memory was 242.7MB in the beginning and 228.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-16 00:25:32,202 INFO L158 Benchmark]: TraceAbstraction took 74444.55ms. Allocated memory was 311.4MB in the beginning and 474.0MB in the end (delta: 162.5MB). Free memory was 227.5MB in the beginning and 172.5MB in the end (delta: 55.0MB). Peak memory consumption was 219.1MB. Max. memory is 8.0GB. [2023-12-16 00:25:32,203 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 200.3MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 178.25ms. Allocated memory is still 311.4MB. Free memory was 257.9MB in the beginning and 246.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.62ms. Allocated memory is still 311.4MB. Free memory was 246.4MB in the beginning and 244.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.44ms. Allocated memory is still 311.4MB. Free memory was 244.8MB in the beginning and 242.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 274.20ms. Allocated memory is still 311.4MB. Free memory was 242.7MB in the beginning and 228.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 74444.55ms. Allocated memory was 311.4MB in the beginning and 474.0MB in the end (delta: 162.5MB). Free memory was 227.5MB in the beginning and 172.5MB in the end (delta: 55.0MB). Peak memory consumption was 219.1MB. Max. memory is 8.0GB. * 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 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 15). Cancelled while NwaCegarLoop was constructing difference of abstraction (69states) and FLOYD_HOARE automaton (currently 64 states, 40 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 89 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 74.4s, OverallIterations: 12, TraceHistogramMax: 5, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 60.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2154 SdHoareTripleChecker+Valid, 11.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2154 mSDsluCounter, 980 SdHoareTripleChecker+Invalid, 10.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 811 mSDsCounter, 787 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3092 IncrementalHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 787 mSolverCounterUnsat, 169 mSDtfsCounter, 3092 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 742 GetRequests, 354 SyntacticMatches, 16 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7559 ImplicationChecksByTransitivity, 53.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=9, InterpolantAutomatonStates: 221, 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, 11 MinimizatonAttempts, 333 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 325 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 530 ConstructedInterpolants, 16 QuantifiedInterpolants, 11559 SizeOfPredicates, 86 NumberOfNonLiveVariables, 1232 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 186/452 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 could not prove your program: Timeout Completed graceful shutdown