/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/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 07:32:24,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 07:32:24,970 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 07:32:24,973 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 07:32:24,974 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 07:32:24,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 07:32:24,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 07:32:24,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 07:32:24,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 07:32:24,993 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 07:32:24,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 07:32:24,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 07:32:24,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 07:32:24,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 07:32:24,995 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 07:32:24,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 07:32:24,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 07:32:24,996 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 07:32:24,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 07:32:24,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 07:32:24,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 07:32:24,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 07:32:24,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 07:32:24,998 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 07:32:24,998 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 07:32:24,998 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 07:32:24,999 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 07:32:24,999 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 07:32:24,999 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 07:32:25,000 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 07:32:25,000 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 07:32:25,000 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 07:32:25,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:32:25,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 07:32:25,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 07:32:25,002 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 07:32:25,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 07:32:25,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 07:32:25,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 07:32:25,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 07:32:25,003 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 07:32:25,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 07:32:25,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 07:32:25,004 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 07:32:25,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 07:32:25,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 07:32:25,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 07:32:25,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 07:32:25,192 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 07:32:25,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i [2023-12-20 07:32:26,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 07:32:26,575 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 07:32:26,576 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i [2023-12-20 07:32:26,582 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec748261/b9bddd9c5c454c1a9414aba496c73c78/FLAG010b7c65e [2023-12-20 07:32:26,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ec748261/b9bddd9c5c454c1a9414aba496c73c78 [2023-12-20 07:32:26,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 07:32:26,598 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 07:32:26,602 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 07:32:26,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 07:32:26,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 07:32:26,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b615dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26, skipping insertion in model container [2023-12-20 07:32:26,607 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,625 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 07:32:26,751 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i[1465,1478] [2023-12-20 07:32:26,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:32:26,762 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 07:32:26,784 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i[1465,1478] [2023-12-20 07:32:26,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:32:26,797 INFO L206 MainTranslator]: Completed translation [2023-12-20 07:32:26,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26 WrapperNode [2023-12-20 07:32:26,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 07:32:26,798 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 07:32:26,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 07:32:26,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 07:32:26,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,810 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,825 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-12-20 07:32:26,825 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 07:32:26,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 07:32:26,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 07:32:26,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 07:32:26,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,847 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-20 07:32:26,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 07:32:26,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 07:32:26,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 07:32:26,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 07:32:26,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (1/1) ... [2023-12-20 07:32:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:32:26,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:26,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 07:32:26,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 07:32:26,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 07:32:26,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 07:32:26,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 07:32:26,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 07:32:26,943 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-12-20 07:32:26,943 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-12-20 07:32:26,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 07:32:26,999 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 07:32:27,001 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 07:32:27,173 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 07:32:27,209 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 07:32:27,210 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 07:32:27,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:32:27 BoogieIcfgContainer [2023-12-20 07:32:27,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 07:32:27,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 07:32:27,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 07:32:27,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 07:32:27,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:32:26" (1/3) ... [2023-12-20 07:32:27,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24820ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:32:27, skipping insertion in model container [2023-12-20 07:32:27,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:32:26" (2/3) ... [2023-12-20 07:32:27,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24820ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:32:27, skipping insertion in model container [2023-12-20 07:32:27,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:32:27" (3/3) ... [2023-12-20 07:32:27,228 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2023-12-20 07:32:27,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 07:32:27,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 07:32:27,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 07:32:27,301 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;@1458e4ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 07:32:27,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 07:32:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 07:32:27,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:27,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:27,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:27,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1502132506, now seen corresponding path program 1 times [2023-12-20 07:32:27,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:27,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26445504] [2023-12-20 07:32:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:27,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26445504] [2023-12-20 07:32:27,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 07:32:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564425356] [2023-12-20 07:32:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:27,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:27,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:27,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:27,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 07:32:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:27,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 07:32:27,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 07:32:27,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:32:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564425356] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:32:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:32:27,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 07:32:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290011575] [2023-12-20 07:32:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:32:27,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 07:32:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 07:32:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 07:32:27,703 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:27,725 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2023-12-20 07:32:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 07:32:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-12-20 07:32:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:27,733 INFO L225 Difference]: With dead ends: 44 [2023-12-20 07:32:27,733 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 07:32:27,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 07:32:27,739 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:27,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 07:32:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 07:32:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-12-20 07:32:27,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 28 [2023-12-20 07:32:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:27,778 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-12-20 07:32:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-12-20 07:32:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 07:32:27,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:27,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:27,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:27,985 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 [2023-12-20 07:32:27,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:27,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1260265879, now seen corresponding path program 1 times [2023-12-20 07:32:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:27,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339852185] [2023-12-20 07:32:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:27,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:28,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:28,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339852185] [2023-12-20 07:32:28,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 07:32:28,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674751562] [2023-12-20 07:32:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:28,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:28,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:28,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:28,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 07:32:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:28,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:32:28,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 07:32:28,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:32:28,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674751562] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:32:28,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:32:28,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 07:32:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818121937] [2023-12-20 07:32:28,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:32:28,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:32:28,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:32:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:28,129 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:32:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:28,141 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-12-20 07:32:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:32:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-12-20 07:32:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:28,143 INFO L225 Difference]: With dead ends: 41 [2023-12-20 07:32:28,143 INFO L226 Difference]: Without dead ends: 22 [2023-12-20 07:32:28,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:28,144 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:28,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-20 07:32:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-20 07:32:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-20 07:32:28,150 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2023-12-20 07:32:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:28,150 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-20 07:32:28,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:32:28,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-20 07:32:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 07:32:28,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:28,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:28,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:28,358 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 [2023-12-20 07:32:28,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:28,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash -432814053, now seen corresponding path program 1 times [2023-12-20 07:32:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:28,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682914818] [2023-12-20 07:32:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:28,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682914818] [2023-12-20 07:32:28,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 07:32:28,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492691274] [2023-12-20 07:32:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:28,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:28,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:28,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:28,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 07:32:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:28,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:32:28,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 07:32:28,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:32:28,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492691274] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:32:28,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:32:28,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:32:28,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684877127] [2023-12-20 07:32:28,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:32:28,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:32:28,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:32:28,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:28,489 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:28,507 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-12-20 07:32:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:32:28,507 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-20 07:32:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:28,508 INFO L225 Difference]: With dead ends: 42 [2023-12-20 07:32:28,508 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 07:32:28,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:28,510 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:28,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 07:32:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-12-20 07:32:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-20 07:32:28,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2023-12-20 07:32:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:28,515 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-20 07:32:28,516 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-20 07:32:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 07:32:28,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:28,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:28,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:28,723 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 [2023-12-20 07:32:28,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:28,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash 28977858, now seen corresponding path program 1 times [2023-12-20 07:32:28,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826133363] [2023-12-20 07:32:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:28,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:28,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:28,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826133363] [2023-12-20 07:32:28,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 07:32:28,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185753526] [2023-12-20 07:32:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:28,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:28,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:28,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:28,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 07:32:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:28,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:32:28,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 07:32:28,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:32:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185753526] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:32:28,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:32:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:32:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133772786] [2023-12-20 07:32:28,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:32:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:32:28,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:32:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:28,856 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:28,868 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-12-20 07:32:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:32:28,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-12-20 07:32:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:28,869 INFO L225 Difference]: With dead ends: 40 [2023-12-20 07:32:28,869 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 07:32:28,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:28,871 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:28,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 07:32:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-20 07:32:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-12-20 07:32:28,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 38 [2023-12-20 07:32:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:28,877 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-12-20 07:32:28,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-12-20 07:32:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 07:32:28,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:28,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:28,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:29,088 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 [2023-12-20 07:32:29,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:29,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:29,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2098863663, now seen corresponding path program 1 times [2023-12-20 07:32:29,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:29,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186194700] [2023-12-20 07:32:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:29,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186194700] [2023-12-20 07:32:29,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 07:32:29,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102137114] [2023-12-20 07:32:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:29,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:29,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:29,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:29,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 07:32:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:32:29,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-20 07:32:29,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:32:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102137114] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:32:29,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:32:29,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:32:29,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010490536] [2023-12-20 07:32:29,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:32:29,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:32:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:32:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:29,226 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:29,242 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-12-20 07:32:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:32:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-12-20 07:32:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:29,244 INFO L225 Difference]: With dead ends: 51 [2023-12-20 07:32:29,244 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 07:32:29,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:32:29,246 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:29,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 07:32:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-20 07:32:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-12-20 07:32:29,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 39 [2023-12-20 07:32:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:29,252 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-12-20 07:32:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:32:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-12-20 07:32:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 07:32:29,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:29,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:29,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:29,459 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 [2023-12-20 07:32:29,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:29,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1976122640, now seen corresponding path program 1 times [2023-12-20 07:32:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:29,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346957040] [2023-12-20 07:32:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:29,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:32:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-20 07:32:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-20 07:32:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 07:32:29,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346957040] [2023-12-20 07:32:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346957040] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:32:29,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072389016] [2023-12-20 07:32:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:29,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:29,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:29,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:29,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 07:32:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:29,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:32:29,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 07:32:29,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 07:32:29,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072389016] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:29,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:32:29,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-20 07:32:29,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414397428] [2023-12-20 07:32:29,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:29,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 07:32:29,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 07:32:29,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:32:29,794 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:32:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:29,820 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-12-20 07:32:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 07:32:29,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-12-20 07:32:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:29,822 INFO L225 Difference]: With dead ends: 58 [2023-12-20 07:32:29,822 INFO L226 Difference]: Without dead ends: 32 [2023-12-20 07:32:29,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:32:29,823 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:29,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-20 07:32:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-20 07:32:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-12-20 07:32:29,827 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 39 [2023-12-20 07:32:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:29,827 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-12-20 07:32:29,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:32:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-12-20 07:32:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 07:32:29,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:29,828 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:29,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:30,031 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 [2023-12-20 07:32:30,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:30,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash -71399842, now seen corresponding path program 2 times [2023-12-20 07:32:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592771195] [2023-12-20 07:32:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 07:32:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 07:32:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-20 07:32:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-20 07:32:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592771195] [2023-12-20 07:32:30,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592771195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:32:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515634856] [2023-12-20 07:32:30,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:32:30,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:30,190 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:30,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 07:32:30,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:32:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:30,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 07:32:30,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 07:32:30,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 07:32:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515634856] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:30,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:32:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-20 07:32:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411106606] [2023-12-20 07:32:30,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:30,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:32:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:32:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:32:30,398 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 07:32:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:30,451 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2023-12-20 07:32:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 07:32:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-12-20 07:32:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:30,453 INFO L225 Difference]: With dead ends: 68 [2023-12-20 07:32:30,453 INFO L226 Difference]: Without dead ends: 42 [2023-12-20 07:32:30,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:32:30,455 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:30,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-20 07:32:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-12-20 07:32:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-12-20 07:32:30,461 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2023-12-20 07:32:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:30,461 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-12-20 07:32:30,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 07:32:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-12-20 07:32:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 07:32:30,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:30,463 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:30,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:30,668 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 [2023-12-20 07:32:30,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:30,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1756456273, now seen corresponding path program 3 times [2023-12-20 07:32:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:30,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448152643] [2023-12-20 07:32:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:32:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-20 07:32:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 07:32:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-20 07:32:30,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448152643] [2023-12-20 07:32:30,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448152643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:32:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463637769] [2023-12-20 07:32:30,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:32:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:30,798 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:30,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 07:32:30,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 07:32:30,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:30,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:32:30,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-20 07:32:30,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:32:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463637769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:32:30,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:32:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-12-20 07:32:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529440012] [2023-12-20 07:32:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:32:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 07:32:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 07:32:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 07:32:30,898 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:32:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:30,926 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-12-20 07:32:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 07:32:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2023-12-20 07:32:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:30,929 INFO L225 Difference]: With dead ends: 71 [2023-12-20 07:32:30,929 INFO L226 Difference]: Without dead ends: 44 [2023-12-20 07:32:30,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 07:32:30,932 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:30,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-20 07:32:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2023-12-20 07:32:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-12-20 07:32:30,950 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 57 [2023-12-20 07:32:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:30,950 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-12-20 07:32:30,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:32:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-12-20 07:32:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 07:32:30,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:30,954 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:30,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:31,163 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 [2023-12-20 07:32:31,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:31,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 882234655, now seen corresponding path program 1 times [2023-12-20 07:32:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:31,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980558575] [2023-12-20 07:32:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:31,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:31,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326266281] [2023-12-20 07:32:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:31,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:31,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:31,193 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:31,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 07:32:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:31,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 07:32:31,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-20 07:32:31,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-20 07:32:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980558575] [2023-12-20 07:32:31,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326266281] [2023-12-20 07:32:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326266281] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:31,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:31,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-12-20 07:32:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058804135] [2023-12-20 07:32:31,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:31,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 07:32:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 07:32:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-12-20 07:32:31,585 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:32:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:31,620 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2023-12-20 07:32:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 07:32:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 66 [2023-12-20 07:32:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:31,623 INFO L225 Difference]: With dead ends: 78 [2023-12-20 07:32:31,623 INFO L226 Difference]: Without dead ends: 51 [2023-12-20 07:32:31,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-12-20 07:32:31,627 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:31,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-20 07:32:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-20 07:32:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-12-20 07:32:31,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 66 [2023-12-20 07:32:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:31,642 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-12-20 07:32:31,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:32:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-12-20 07:32:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 07:32:31,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:31,643 INFO L195 NwaCegarLoop]: trace histogram [22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:31,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:31,843 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 [2023-12-20 07:32:31,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:31,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2034988385, now seen corresponding path program 2 times [2023-12-20 07:32:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180960983] [2023-12-20 07:32:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:31,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924507995] [2023-12-20 07:32:31,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:32:31,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:31,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:31,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:31,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 07:32:32,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:32:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:32,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 07:32:32,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-20 07:32:32,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-20 07:32:32,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:32,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180960983] [2023-12-20 07:32:32,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:32,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924507995] [2023-12-20 07:32:32,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924507995] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:32,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:32,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 42 [2023-12-20 07:32:32,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907723772] [2023-12-20 07:32:32,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:32,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 07:32:32,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 07:32:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 07:32:32,923 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:32:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:32,986 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2023-12-20 07:32:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-20 07:32:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2023-12-20 07:32:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:32,988 INFO L225 Difference]: With dead ends: 96 [2023-12-20 07:32:32,988 INFO L226 Difference]: Without dead ends: 69 [2023-12-20 07:32:32,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 07:32:32,989 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:32,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 178 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-20 07:32:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-20 07:32:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-12-20 07:32:32,995 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 78 [2023-12-20 07:32:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:32,995 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-12-20 07:32:32,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 42 states have internal predecessors, (68), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:32:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-12-20 07:32:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-20 07:32:32,996 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:32,997 INFO L195 NwaCegarLoop]: trace histogram [40, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:33,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-20 07:32:33,203 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 [2023-12-20 07:32:33,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:33,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1427415775, now seen corresponding path program 3 times [2023-12-20 07:32:33,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:33,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752583903] [2023-12-20 07:32:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:33,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:33,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546173610] [2023-12-20 07:32:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:32:33,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:33,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:33,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 07:32:33,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 07:32:33,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:33,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:32:33,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2023-12-20 07:32:33,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-12-20 07:32:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752583903] [2023-12-20 07:32:33,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546173610] [2023-12-20 07:32:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546173610] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:33,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-12-20 07:32:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762918827] [2023-12-20 07:32:33,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:33,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 07:32:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 07:32:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-20 07:32:33,397 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:33,410 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2023-12-20 07:32:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 07:32:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 96 [2023-12-20 07:32:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:33,411 INFO L225 Difference]: With dead ends: 92 [2023-12-20 07:32:33,411 INFO L226 Difference]: Without dead ends: 72 [2023-12-20 07:32:33,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-20 07:32:33,412 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:33,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-20 07:32:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-12-20 07:32:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2023-12-20 07:32:33,417 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 96 [2023-12-20 07:32:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:33,418 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2023-12-20 07:32:33,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2023-12-20 07:32:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-20 07:32:33,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:33,419 INFO L195 NwaCegarLoop]: trace histogram [40, 9, 9, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:33,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:33,631 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 [2023-12-20 07:32:33,631 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:33,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash -240787698, now seen corresponding path program 4 times [2023-12-20 07:32:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:33,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405515108] [2023-12-20 07:32:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:33,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061450874] [2023-12-20 07:32:33,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:32:33,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:33,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:33,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 07:32:33,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:32:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:33,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 07:32:33,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2023-12-20 07:32:33,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2023-12-20 07:32:33,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:33,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405515108] [2023-12-20 07:32:33,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061450874] [2023-12-20 07:32:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061450874] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:33,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-20 07:32:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613311152] [2023-12-20 07:32:33,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 07:32:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 07:32:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-12-20 07:32:33,913 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:33,945 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2023-12-20 07:32:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 07:32:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 99 [2023-12-20 07:32:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:33,947 INFO L225 Difference]: With dead ends: 112 [2023-12-20 07:32:33,947 INFO L226 Difference]: Without dead ends: 84 [2023-12-20 07:32:33,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-12-20 07:32:33,948 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:33,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-20 07:32:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-20 07:32:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-12-20 07:32:33,954 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 99 [2023-12-20 07:32:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:33,954 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-12-20 07:32:33,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-12-20 07:32:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-20 07:32:33,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:33,956 INFO L195 NwaCegarLoop]: trace histogram [40, 21, 21, 18, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:33,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:34,162 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 [2023-12-20 07:32:34,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:34,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash -287260338, now seen corresponding path program 5 times [2023-12-20 07:32:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526884433] [2023-12-20 07:32:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:34,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:34,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245322681] [2023-12-20 07:32:34,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:32:34,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:34,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:34,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 07:32:34,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-20 07:32:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:34,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 07:32:34,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 363 proven. 7 refuted. 0 times theorem prover too weak. 1168 trivial. 0 not checked. [2023-12-20 07:32:34,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 37 proven. 131 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2023-12-20 07:32:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526884433] [2023-12-20 07:32:34,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245322681] [2023-12-20 07:32:34,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245322681] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:34,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:34,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-20 07:32:34,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454970934] [2023-12-20 07:32:34,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:34,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 07:32:34,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:34,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 07:32:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:32:34,528 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:32:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:34,564 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2023-12-20 07:32:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 07:32:34,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2023-12-20 07:32:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:34,566 INFO L225 Difference]: With dead ends: 142 [2023-12-20 07:32:34,566 INFO L226 Difference]: Without dead ends: 102 [2023-12-20 07:32:34,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:32:34,567 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:34,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 74 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-20 07:32:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-12-20 07:32:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2023-12-20 07:32:34,573 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 135 [2023-12-20 07:32:34,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:34,573 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2023-12-20 07:32:34,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:32:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2023-12-20 07:32:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-12-20 07:32:34,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:34,575 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 21, 18, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:34,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:34,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 07:32:34,780 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:34,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash -441933970, now seen corresponding path program 6 times [2023-12-20 07:32:34,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:34,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519797012] [2023-12-20 07:32:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:34,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:34,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:34,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521734242] [2023-12-20 07:32:34,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:32:34,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:34,820 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:34,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 07:32:35,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 07:32:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:35,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 07:32:35,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3185 backedges. 1076 proven. 10 refuted. 0 times theorem prover too weak. 2099 trivial. 0 not checked. [2023-12-20 07:32:35,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3185 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2023-12-20 07:32:35,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:35,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519797012] [2023-12-20 07:32:35,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:35,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521734242] [2023-12-20 07:32:35,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521734242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:35,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:35,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-20 07:32:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646333845] [2023-12-20 07:32:35,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 07:32:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 07:32:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:32:35,191 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:35,213 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2023-12-20 07:32:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 07:32:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 189 [2023-12-20 07:32:35,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:35,214 INFO L225 Difference]: With dead ends: 158 [2023-12-20 07:32:35,214 INFO L226 Difference]: Without dead ends: 108 [2023-12-20 07:32:35,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:32:35,215 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:35,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-20 07:32:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-12-20 07:32:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2023-12-20 07:32:35,220 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 189 [2023-12-20 07:32:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:35,221 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2023-12-20 07:32:35,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2023-12-20 07:32:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-20 07:32:35,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:35,223 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 21, 18, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:35,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-20 07:32:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:35,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:35,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1678219826, now seen corresponding path program 7 times [2023-12-20 07:32:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439105284] [2023-12-20 07:32:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:35,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:35,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909421256] [2023-12-20 07:32:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:32:35,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:35,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:35,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 07:32:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:35,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:32:35,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3230 backedges. 669 proven. 57 refuted. 0 times theorem prover too weak. 2504 trivial. 0 not checked. [2023-12-20 07:32:35,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3230 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 1966 trivial. 0 not checked. [2023-12-20 07:32:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439105284] [2023-12-20 07:32:35,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909421256] [2023-12-20 07:32:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909421256] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:35,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:35,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-20 07:32:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672680795] [2023-12-20 07:32:35,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:35,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 07:32:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 07:32:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-12-20 07:32:35,897 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:32:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:35,999 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2023-12-20 07:32:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 07:32:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 195 [2023-12-20 07:32:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:36,000 INFO L225 Difference]: With dead ends: 196 [2023-12-20 07:32:36,000 INFO L226 Difference]: Without dead ends: 132 [2023-12-20 07:32:36,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-12-20 07:32:36,002 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:36,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:32:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-20 07:32:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-20 07:32:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2023-12-20 07:32:36,009 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 195 [2023-12-20 07:32:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:36,009 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2023-12-20 07:32:36,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:32:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2023-12-20 07:32:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-20 07:32:36,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:36,012 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 42, 40, 21, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:36,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:36,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 07:32:36,220 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:36,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:36,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1615836594, now seen corresponding path program 8 times [2023-12-20 07:32:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:36,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763599985] [2023-12-20 07:32:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:36,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:36,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608375416] [2023-12-20 07:32:36,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:32:36,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:36,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:36,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 07:32:36,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:32:36,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:36,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 07:32:36,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6938 backedges. 2173 proven. 301 refuted. 0 times theorem prover too weak. 4464 trivial. 0 not checked. [2023-12-20 07:32:36,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6938 backedges. 293 proven. 3039 refuted. 0 times theorem prover too weak. 3606 trivial. 0 not checked. [2023-12-20 07:32:36,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:36,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763599985] [2023-12-20 07:32:36,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:36,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608375416] [2023-12-20 07:32:36,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608375416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:36,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:36,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2023-12-20 07:32:36,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942202954] [2023-12-20 07:32:36,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:36,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 07:32:36,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:36,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 07:32:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-12-20 07:32:36,970 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:32:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:37,052 INFO L93 Difference]: Finished difference Result 241 states and 273 transitions. [2023-12-20 07:32:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 07:32:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 267 [2023-12-20 07:32:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:37,053 INFO L225 Difference]: With dead ends: 241 [2023-12-20 07:32:37,054 INFO L226 Difference]: Without dead ends: 153 [2023-12-20 07:32:37,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 502 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-12-20 07:32:37,055 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:37,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:32:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-20 07:32:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-12-20 07:32:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0743243243243243) internal successors, (159), 148 states have internal predecessors, (159), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2023-12-20 07:32:37,062 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 267 [2023-12-20 07:32:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:37,063 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2023-12-20 07:32:37,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:32:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2023-12-20 07:32:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-12-20 07:32:37,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:37,066 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 63, 40, 21, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:37,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:37,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-20 07:32:37,275 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:37,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash 872660487, now seen corresponding path program 9 times [2023-12-20 07:32:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:37,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434741838] [2023-12-20 07:32:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:37,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:37,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:37,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152024655] [2023-12-20 07:32:37,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:32:37,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:37,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:37,326 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:37,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 07:32:38,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 07:32:38,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:38,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 07:32:38,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11600 backedges. 4826 proven. 55 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2023-12-20 07:32:38,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11600 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 11545 trivial. 0 not checked. [2023-12-20 07:32:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434741838] [2023-12-20 07:32:38,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152024655] [2023-12-20 07:32:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152024655] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:38,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:38,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-12-20 07:32:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572769827] [2023-12-20 07:32:38,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 07:32:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 07:32:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-12-20 07:32:38,501 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:38,537 INFO L93 Difference]: Finished difference Result 260 states and 292 transitions. [2023-12-20 07:32:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 07:32:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 330 [2023-12-20 07:32:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:38,538 INFO L225 Difference]: With dead ends: 260 [2023-12-20 07:32:38,538 INFO L226 Difference]: Without dead ends: 165 [2023-12-20 07:32:38,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-12-20 07:32:38,540 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:38,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:32:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-20 07:32:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-12-20 07:32:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2023-12-20 07:32:38,547 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 330 [2023-12-20 07:32:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:38,547 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2023-12-20 07:32:38,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:32:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2023-12-20 07:32:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-12-20 07:32:38,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:38,552 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 63, 40, 22, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:38,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:38,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-20 07:32:38,762 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:38,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -506031289, now seen corresponding path program 10 times [2023-12-20 07:32:38,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:38,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479814591] [2023-12-20 07:32:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:38,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:38,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:38,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009368181] [2023-12-20 07:32:38,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:32:38,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:38,811 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:38,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 07:32:39,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:32:39,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:39,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 07:32:39,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11798 backedges. 4824 proven. 1162 refuted. 0 times theorem prover too weak. 5812 trivial. 0 not checked. [2023-12-20 07:32:39,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11798 backedges. 4824 proven. 1162 refuted. 0 times theorem prover too weak. 5812 trivial. 0 not checked. [2023-12-20 07:32:40,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:40,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479814591] [2023-12-20 07:32:40,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 07:32:40,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009368181] [2023-12-20 07:32:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009368181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:40,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 07:32:40,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 42 [2023-12-20 07:32:40,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101124609] [2023-12-20 07:32:40,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 07:32:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 07:32:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 07:32:40,246 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 states have internal predecessors, (150), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:32:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:40,416 INFO L93 Difference]: Finished difference Result 322 states and 371 transitions. [2023-12-20 07:32:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-20 07:32:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 states have internal predecessors, (150), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 342 [2023-12-20 07:32:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:40,418 INFO L225 Difference]: With dead ends: 322 [2023-12-20 07:32:40,418 INFO L226 Difference]: Without dead ends: 201 [2023-12-20 07:32:40,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 624 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 07:32:40,419 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:40,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 146 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:32:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-20 07:32:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-12-20 07:32:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.1173469387755102) internal successors, (219), 196 states have internal predecessors, (219), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:32:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2023-12-20 07:32:40,427 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 342 [2023-12-20 07:32:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:40,428 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2023-12-20 07:32:40,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 states have internal predecessors, (150), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:32:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2023-12-20 07:32:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-12-20 07:32:40,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:40,431 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:40,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 07:32:40,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 07:32:40,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:40,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1696924935, now seen corresponding path program 11 times [2023-12-20 07:32:40,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:40,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026869813] [2023-12-20 07:32:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:40,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:40,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 07:32:40,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260195036] [2023-12-20 07:32:40,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:32:40,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:40,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:40,690 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:40,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 07:47:11,543 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 [2023-12-20 07:47:11,544 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 07:47:12,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-20 07:47:12,750 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forcibly destroying the process [2023-12-20 07:47:12,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 137 [2023-12-20 07:47:12,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-20 07:47:12,807 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 07:47:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 07:47:12,807 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 451 with TraceHistMax 120,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-20 07:47:12,811 INFO L445 BasicCegarLoop]: Path program histogram: [11, 3, 1, 1, 1, 1, 1] [2023-12-20 07:47:12,812 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 07:47:12,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 07:47:12 BoogieIcfgContainer [2023-12-20 07:47:12,814 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 07:47:12,814 INFO L158 Benchmark]: Toolchain (without parser) took 886216.37ms. Allocated memory was 209.7MB in the beginning and 324.0MB in the end (delta: 114.3MB). Free memory was 163.9MB in the beginning and 166.8MB in the end (delta: -2.9MB). Peak memory consumption was 112.2MB. Max. memory is 8.0GB. [2023-12-20 07:47:12,815 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 209.7MB. Free memory is still 157.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 07:47:12,815 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.03ms. Allocated memory is still 209.7MB. Free memory was 163.5MB in the beginning and 152.3MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 07:47:12,815 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.97ms. Allocated memory is still 209.7MB. Free memory was 152.3MB in the beginning and 150.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 07:47:12,815 INFO L158 Benchmark]: Boogie Preprocessor took 33.34ms. Allocated memory is still 209.7MB. Free memory was 150.6MB in the beginning and 148.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 07:47:12,816 INFO L158 Benchmark]: RCFGBuilder took 350.31ms. Allocated memory is still 209.7MB. Free memory was 148.5MB in the beginning and 135.2MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 07:47:12,816 INFO L158 Benchmark]: TraceAbstraction took 885595.44ms. Allocated memory was 209.7MB in the beginning and 324.0MB in the end (delta: 114.3MB). Free memory was 134.5MB in the beginning and 166.8MB in the end (delta: -32.3MB). Peak memory consumption was 82.8MB. Max. memory is 8.0GB. [2023-12-20 07:47:12,817 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 209.7MB. Free memory is still 157.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.03ms. Allocated memory is still 209.7MB. Free memory was 163.5MB in the beginning and 152.3MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.97ms. Allocated memory is still 209.7MB. Free memory was 152.3MB in the beginning and 150.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.34ms. Allocated memory is still 209.7MB. Free memory was 150.6MB in the beginning and 148.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 350.31ms. Allocated memory is still 209.7MB. Free memory was 148.5MB in the beginning and 135.2MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 885595.44ms. Allocated memory was 209.7MB in the beginning and 324.0MB in the end (delta: 114.3MB). Free memory was 134.5MB in the beginning and 166.8MB in the end (delta: -32.3MB). Peak memory consumption was 82.8MB. 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: 61]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 61). Cancelled while NwaCegarLoop was analyzing trace of length 451 with TraceHistMax 120,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 885.5s, OverallIterations: 19, TraceHistogramMax: 120, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 1386 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 982 mSDsCounter, 59 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 679 IncrementalHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 59 mSolverCounterUnsat, 404 mSDtfsCounter, 679 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3975 GetRequests, 3732 SyntacticMatches, 33 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=18, InterpolantAutomatonStates: 245, 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, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 2397 NumberOfCodeBlocks, 1819 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 4080 ConstructedInterpolants, 0 QuantifiedInterpolants, 5012 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6302 ConjunctsInSsa, 151 ConjunctsInUnsatCore, 33 InterpolantComputations, 6 PerfectInterpolantSequences, 74473/82320 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