/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 20:51:24,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 20:51:24,970 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 20:51:24,973 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 20:51:24,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 20:51:24,986 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 20:51:24,987 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 20:51:24,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 20:51:24,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 20:51:24,988 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 20:51:24,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 20:51:24,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 20:51:24,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 20:51:24,989 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 20:51:24,989 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 20:51:24,989 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 20:51:24,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 20:51:24,990 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 20:51:24,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 20:51:24,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 20:51:24,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 20:51:24,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 20:51:24,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 20:51:24,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 20:51:24,991 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 20:51:24,992 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 20:51:24,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 20:51:24,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 20:51:24,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 20:51:24,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 20:51:24,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 20:51:24,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 20:51:24,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 20:51:24,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 20:51:24,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 20:51:24,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 20:51:24,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 20:51:24,994 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 20:51:25,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 20:51:25,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 20:51:25,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 20:51:25,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 20:51:25,215 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 20:51:25,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i [2023-12-15 20:51:26,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 20:51:26,435 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 20:51:26,436 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i [2023-12-15 20:51:26,445 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f3dce56/4a4af576041c4aa493f62ff7522fe43f/FLAGd6470270b [2023-12-15 20:51:26,461 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f3dce56/4a4af576041c4aa493f62ff7522fe43f [2023-12-15 20:51:26,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 20:51:26,465 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 20:51:26,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 20:51:26,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 20:51:26,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 20:51:26,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384b47be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26, skipping insertion in model container [2023-12-15 20:51:26,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,503 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 20:51:26,609 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i[916,929] [2023-12-15 20:51:26,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 20:51:26,679 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 20:51:26,686 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-68.i[916,929] [2023-12-15 20:51:26,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 20:51:26,729 INFO L206 MainTranslator]: Completed translation [2023-12-15 20:51:26,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26 WrapperNode [2023-12-15 20:51:26,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 20:51:26,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 20:51:26,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 20:51:26,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 20:51:26,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,776 INFO L138 Inliner]: procedures = 26, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 370 [2023-12-15 20:51:26,777 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 20:51:26,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 20:51:26,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 20:51:26,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 20:51:26,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,789 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,809 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 20:51:26,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,844 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 20:51:26,845 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 20:51:26,845 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 20:51:26,845 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 20:51:26,846 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (1/1) ... [2023-12-15 20:51:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 20:51:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:26,873 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) [2023-12-15 20:51:26,894 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 [2023-12-15 20:51:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 20:51:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 20:51:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 20:51:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 20:51:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 20:51:26,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 20:51:26,968 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 20:51:26,971 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 20:51:27,417 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 20:51:27,450 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 20:51:27,450 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 20:51:27,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:51:27 BoogieIcfgContainer [2023-12-15 20:51:27,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 20:51:27,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 20:51:27,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 20:51:27,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 20:51:27,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:51:26" (1/3) ... [2023-12-15 20:51:27,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7daa1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:51:27, skipping insertion in model container [2023-12-15 20:51:27,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:51:26" (2/3) ... [2023-12-15 20:51:27,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7daa1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:51:27, skipping insertion in model container [2023-12-15 20:51:27,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:51:27" (3/3) ... [2023-12-15 20:51:27,457 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-68.i [2023-12-15 20:51:27,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 20:51:27,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 20:51:27,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 20:51:27,521 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;@4e9c8a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 20:51:27,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 20:51:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 100 states have (on average 1.55) internal successors, (155), 101 states have internal predecessors, (155), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-15 20:51:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-12-15 20:51:27,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:27,547 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:27,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:27,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:27,552 INFO L85 PathProgramCache]: Analyzing trace with hash -724554634, now seen corresponding path program 1 times [2023-12-15 20:51:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:27,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952477528] [2023-12-15 20:51:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:27,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952477528] [2023-12-15 20:51:27,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 20:51:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947577125] [2023-12-15 20:51:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:27,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:27,851 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) [2023-12-15 20:51:27,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 20:51:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:28,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 20:51:28,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2023-12-15 20:51:28,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:51:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947577125] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:51:28,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:51:28,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 20:51:28,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026518762] [2023-12-15 20:51:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:51:28,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 20:51:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 20:51:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 20:51:28,141 INFO L87 Difference]: Start difference. First operand has 143 states, 100 states have (on average 1.55) internal successors, (155), 101 states have internal predecessors, (155), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 2 states have call successors, (40) [2023-12-15 20:51:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:28,180 INFO L93 Difference]: Finished difference Result 283 states and 508 transitions. [2023-12-15 20:51:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 20:51:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 2 states have call successors, (40) Word has length 265 [2023-12-15 20:51:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:28,188 INFO L225 Difference]: With dead ends: 283 [2023-12-15 20:51:28,188 INFO L226 Difference]: Without dead ends: 141 [2023-12-15 20:51:28,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 20:51:28,192 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:28,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:51:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-12-15 20:51:28,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-12-15 20:51:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-15 20:51:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 230 transitions. [2023-12-15 20:51:28,244 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 230 transitions. Word has length 265 [2023-12-15 20:51:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:28,244 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 230 transitions. [2023-12-15 20:51:28,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 2 states have call successors, (40) [2023-12-15 20:51:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 230 transitions. [2023-12-15 20:51:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-12-15 20:51:28,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:28,248 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:28,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 20:51:28,455 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 [2023-12-15 20:51:28,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:28,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -311038534, now seen corresponding path program 1 times [2023-12-15 20:51:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904630432] [2023-12-15 20:51:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:28,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:28,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209106739] [2023-12-15 20:51:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:28,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:28,521 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) [2023-12-15 20:51:28,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 20:51:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:28,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 20:51:28,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-12-15 20:51:28,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:51:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904630432] [2023-12-15 20:51:28,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209106739] [2023-12-15 20:51:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209106739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:51:28,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:51:28,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 20:51:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568626605] [2023-12-15 20:51:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:51:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 20:51:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 20:51:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:51:28,779 INFO L87 Difference]: Start difference. First operand 141 states and 230 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-12-15 20:51:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:28,830 INFO L93 Difference]: Finished difference Result 281 states and 459 transitions. [2023-12-15 20:51:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 20:51:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 265 [2023-12-15 20:51:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:28,836 INFO L225 Difference]: With dead ends: 281 [2023-12-15 20:51:28,836 INFO L226 Difference]: Without dead ends: 141 [2023-12-15 20:51:28,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 20:51:28,837 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 57 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:28,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 391 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:51:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-12-15 20:51:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-12-15 20:51:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 99 states have (on average 1.505050505050505) internal successors, (149), 99 states have internal predecessors, (149), 40 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-15 20:51:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 229 transitions. [2023-12-15 20:51:28,860 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 229 transitions. Word has length 265 [2023-12-15 20:51:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:28,862 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 229 transitions. [2023-12-15 20:51:28,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-12-15 20:51:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 229 transitions. [2023-12-15 20:51:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-12-15 20:51:28,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:28,865 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:28,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:29,065 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 [2023-12-15 20:51:29,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:29,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1155044036, now seen corresponding path program 1 times [2023-12-15 20:51:29,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:29,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058706561] [2023-12-15 20:51:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:29,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:29,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604988807] [2023-12-15 20:51:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:29,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:29,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:29,116 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) [2023-12-15 20:51:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 20:51:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:29,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:51:29,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-12-15 20:51:29,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058706561] [2023-12-15 20:51:29,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604988807] [2023-12-15 20:51:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604988807] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:29,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:29,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 20:51:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136451360] [2023-12-15 20:51:29,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 20:51:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 20:51:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 20:51:29,804 INFO L87 Difference]: Start difference. First operand 141 states and 229 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 20:51:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:30,035 INFO L93 Difference]: Finished difference Result 287 states and 462 transitions. [2023-12-15 20:51:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 20:51:30,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 265 [2023-12-15 20:51:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:30,037 INFO L225 Difference]: With dead ends: 287 [2023-12-15 20:51:30,038 INFO L226 Difference]: Without dead ends: 147 [2023-12-15 20:51:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:51:30,039 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 113 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:30,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 377 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 20:51:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-15 20:51:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2023-12-15 20:51:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.411764705882353) internal successors, (144), 102 states have internal predecessors, (144), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-15 20:51:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 224 transitions. [2023-12-15 20:51:30,051 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 224 transitions. Word has length 265 [2023-12-15 20:51:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:30,052 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 224 transitions. [2023-12-15 20:51:30,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 20:51:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 224 transitions. [2023-12-15 20:51:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-15 20:51:30,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:30,055 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:30,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:30,261 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 [2023-12-15 20:51:30,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:30,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2145290162, now seen corresponding path program 1 times [2023-12-15 20:51:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:30,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515981787] [2023-12-15 20:51:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:30,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:30,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257785074] [2023-12-15 20:51:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:30,300 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) [2023-12-15 20:51:30,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 20:51:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:30,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 20:51:30,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1219 proven. 87 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2023-12-15 20:51:30,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 30 proven. 87 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515981787] [2023-12-15 20:51:30,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257785074] [2023-12-15 20:51:30,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257785074] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:30,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:30,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 20:51:30,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583315344] [2023-12-15 20:51:30,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:30,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 20:51:30,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 20:51:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 20:51:30,841 INFO L87 Difference]: Start difference. First operand 145 states and 224 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (69), 2 states have call predecessors, (69), 4 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2023-12-15 20:51:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:31,171 INFO L93 Difference]: Finished difference Result 449 states and 684 transitions. [2023-12-15 20:51:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 20:51:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (69), 2 states have call predecessors, (69), 4 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) Word has length 266 [2023-12-15 20:51:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:31,174 INFO L225 Difference]: With dead ends: 449 [2023-12-15 20:51:31,174 INFO L226 Difference]: Without dead ends: 305 [2023-12-15 20:51:31,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 523 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-15 20:51:31,175 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 550 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:31,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 607 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 20:51:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-12-15 20:51:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2023-12-15 20:51:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 208 states have (on average 1.3990384615384615) internal successors, (291), 208 states have internal predecessors, (291), 80 states have call successors, (80), 6 states have call predecessors, (80), 6 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-12-15 20:51:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 451 transitions. [2023-12-15 20:51:31,200 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 451 transitions. Word has length 266 [2023-12-15 20:51:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:31,200 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 451 transitions. [2023-12-15 20:51:31,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (69), 2 states have call predecessors, (69), 4 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2023-12-15 20:51:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 451 transitions. [2023-12-15 20:51:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-15 20:51:31,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:31,203 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:31,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:31,408 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 [2023-12-15 20:51:31,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:31,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1128608780, now seen corresponding path program 1 times [2023-12-15 20:51:31,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:31,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786559145] [2023-12-15 20:51:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:31,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:31,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310301715] [2023-12-15 20:51:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:31,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:31,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:31,437 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) [2023-12-15 20:51:31,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 20:51:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:31,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 20:51:31,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1327 proven. 33 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2023-12-15 20:51:31,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 84 proven. 33 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:31,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786559145] [2023-12-15 20:51:31,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310301715] [2023-12-15 20:51:31,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310301715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:31,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:31,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-15 20:51:31,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888453351] [2023-12-15 20:51:31,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:31,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 20:51:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 20:51:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:51:31,863 INFO L87 Difference]: Start difference. First operand 295 states and 451 transitions. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-12-15 20:51:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:32,327 INFO L93 Difference]: Finished difference Result 621 states and 933 transitions. [2023-12-15 20:51:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 20:51:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 266 [2023-12-15 20:51:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:32,332 INFO L225 Difference]: With dead ends: 621 [2023-12-15 20:51:32,332 INFO L226 Difference]: Without dead ends: 327 [2023-12-15 20:51:32,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-12-15 20:51:32,335 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 187 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:32,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 601 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 20:51:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-15 20:51:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 313. [2023-12-15 20:51:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 222 states have (on average 1.3738738738738738) internal successors, (305), 222 states have internal predecessors, (305), 80 states have call successors, (80), 10 states have call predecessors, (80), 10 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-12-15 20:51:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 465 transitions. [2023-12-15 20:51:32,373 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 465 transitions. Word has length 266 [2023-12-15 20:51:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:32,376 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 465 transitions. [2023-12-15 20:51:32,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 3 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2023-12-15 20:51:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 465 transitions. [2023-12-15 20:51:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:32,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:32,378 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:32,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:32,584 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 [2023-12-15 20:51:32,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:32,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash -380177564, now seen corresponding path program 1 times [2023-12-15 20:51:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261188499] [2023-12-15 20:51:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:32,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:32,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198015995] [2023-12-15 20:51:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:32,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:32,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:32,618 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) [2023-12-15 20:51:32,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 20:51:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:32,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 20:51:32,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1509 proven. 72 refuted. 0 times theorem prover too weak. 1539 trivial. 0 not checked. [2023-12-15 20:51:32,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:33,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:33,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261188499] [2023-12-15 20:51:33,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:33,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198015995] [2023-12-15 20:51:33,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198015995] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:33,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:33,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-15 20:51:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489571001] [2023-12-15 20:51:33,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:33,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 20:51:33,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 20:51:33,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-15 20:51:33,123 INFO L87 Difference]: Start difference. First operand 313 states and 465 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 3 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-12-15 20:51:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:33,528 INFO L93 Difference]: Finished difference Result 859 states and 1257 transitions. [2023-12-15 20:51:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 20:51:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 3 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) Word has length 267 [2023-12-15 20:51:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:33,531 INFO L225 Difference]: With dead ends: 859 [2023-12-15 20:51:33,531 INFO L226 Difference]: Without dead ends: 547 [2023-12-15 20:51:33,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2023-12-15 20:51:33,533 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 330 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:33,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 782 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 20:51:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-12-15 20:51:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 523. [2023-12-15 20:51:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 398 states have (on average 1.3919597989949748) internal successors, (554), 400 states have internal predecessors, (554), 106 states have call successors, (106), 18 states have call predecessors, (106), 18 states have return successors, (106), 104 states have call predecessors, (106), 106 states have call successors, (106) [2023-12-15 20:51:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 766 transitions. [2023-12-15 20:51:33,569 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 766 transitions. Word has length 267 [2023-12-15 20:51:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:33,569 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 766 transitions. [2023-12-15 20:51:33,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 3 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-12-15 20:51:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 766 transitions. [2023-12-15 20:51:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:33,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:33,573 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:33,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:33,779 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 [2023-12-15 20:51:33,779 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:33,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1751984862, now seen corresponding path program 1 times [2023-12-15 20:51:33,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:33,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492615072] [2023-12-15 20:51:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:33,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:33,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874041429] [2023-12-15 20:51:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:33,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:33,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:33,817 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) [2023-12-15 20:51:33,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 20:51:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:33,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 20:51:33,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-12-15 20:51:34,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:34,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492615072] [2023-12-15 20:51:34,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:34,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874041429] [2023-12-15 20:51:34,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874041429] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:34,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:34,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-15 20:51:34,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201552511] [2023-12-15 20:51:34,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:34,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 20:51:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:34,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 20:51:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-15 20:51:34,347 INFO L87 Difference]: Start difference. First operand 523 states and 766 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 20:51:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:34,633 INFO L93 Difference]: Finished difference Result 1073 states and 1567 transitions. [2023-12-15 20:51:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 20:51:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 267 [2023-12-15 20:51:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:34,637 INFO L225 Difference]: With dead ends: 1073 [2023-12-15 20:51:34,637 INFO L226 Difference]: Without dead ends: 551 [2023-12-15 20:51:34,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-12-15 20:51:34,638 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 225 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:34,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 659 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 20:51:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-12-15 20:51:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 527. [2023-12-15 20:51:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 402 states have (on average 1.3880597014925373) internal successors, (558), 404 states have internal predecessors, (558), 106 states have call successors, (106), 18 states have call predecessors, (106), 18 states have return successors, (106), 104 states have call predecessors, (106), 106 states have call successors, (106) [2023-12-15 20:51:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 770 transitions. [2023-12-15 20:51:34,663 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 770 transitions. Word has length 267 [2023-12-15 20:51:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:34,664 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 770 transitions. [2023-12-15 20:51:34,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 20:51:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 770 transitions. [2023-12-15 20:51:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:34,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:34,666 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:34,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:34,875 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 [2023-12-15 20:51:34,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:34,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2033509344, now seen corresponding path program 1 times [2023-12-15 20:51:34,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:34,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186927090] [2023-12-15 20:51:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:34,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:34,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144185181] [2023-12-15 20:51:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:34,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:34,914 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) [2023-12-15 20:51:34,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 20:51:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:35,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 20:51:35,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-12-15 20:51:35,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:51:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:35,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186927090] [2023-12-15 20:51:35,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:35,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144185181] [2023-12-15 20:51:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144185181] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:51:35,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:51:35,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 20:51:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980156623] [2023-12-15 20:51:35,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:51:35,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 20:51:35,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 20:51:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 20:51:35,301 INFO L87 Difference]: Start difference. First operand 527 states and 770 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-12-15 20:51:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:35,534 INFO L93 Difference]: Finished difference Result 1603 states and 2332 transitions. [2023-12-15 20:51:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 20:51:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 267 [2023-12-15 20:51:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:35,538 INFO L225 Difference]: With dead ends: 1603 [2023-12-15 20:51:35,538 INFO L226 Difference]: Without dead ends: 1077 [2023-12-15 20:51:35,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-15 20:51:35,540 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 193 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:35,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 671 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 20:51:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-12-15 20:51:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1071. [2023-12-15 20:51:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 818 states have (on average 1.3814180929095354) internal successors, (1130), 822 states have internal predecessors, (1130), 212 states have call successors, (212), 40 states have call predecessors, (212), 40 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) [2023-12-15 20:51:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1554 transitions. [2023-12-15 20:51:35,610 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1554 transitions. Word has length 267 [2023-12-15 20:51:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:35,611 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1554 transitions. [2023-12-15 20:51:35,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-12-15 20:51:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1554 transitions. [2023-12-15 20:51:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:35,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:35,613 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:35,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:35,819 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 [2023-12-15 20:51:35,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:35,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1758749730, now seen corresponding path program 1 times [2023-12-15 20:51:35,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:35,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803456847] [2023-12-15 20:51:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:35,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:35,837 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:35,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594347982] [2023-12-15 20:51:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:35,839 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) [2023-12-15 20:51:35,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 20:51:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:35,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-15 20:51:35,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-12-15 20:51:36,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-12-15 20:51:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803456847] [2023-12-15 20:51:36,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594347982] [2023-12-15 20:51:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594347982] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 20:51:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 20:51:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2023-12-15 20:51:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693216870] [2023-12-15 20:51:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:51:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 20:51:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 20:51:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2023-12-15 20:51:36,812 INFO L87 Difference]: Start difference. First operand 1071 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-12-15 20:51:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:38,352 INFO L93 Difference]: Finished difference Result 5379 states and 7774 transitions. [2023-12-15 20:51:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 20:51:38,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 267 [2023-12-15 20:51:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:38,368 INFO L225 Difference]: With dead ends: 5379 [2023-12-15 20:51:38,368 INFO L226 Difference]: Without dead ends: 4853 [2023-12-15 20:51:38,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2023-12-15 20:51:38,371 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1126 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:38,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1230 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-15 20:51:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2023-12-15 20:51:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 1747. [2023-12-15 20:51:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1378 states have (on average 1.4020319303338171) internal successors, (1932), 1390 states have internal predecessors, (1932), 306 states have call successors, (306), 62 states have call predecessors, (306), 62 states have return successors, (306), 294 states have call predecessors, (306), 306 states have call successors, (306) [2023-12-15 20:51:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2544 transitions. [2023-12-15 20:51:38,535 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2544 transitions. Word has length 267 [2023-12-15 20:51:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:38,535 INFO L495 AbstractCegarLoop]: Abstraction has 1747 states and 2544 transitions. [2023-12-15 20:51:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2023-12-15 20:51:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2544 transitions. [2023-12-15 20:51:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:38,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:38,538 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:38,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:38,743 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 [2023-12-15 20:51:38,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:38,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash 747632480, now seen corresponding path program 1 times [2023-12-15 20:51:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351969012] [2023-12-15 20:51:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:38,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:38,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320789315] [2023-12-15 20:51:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:38,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:38,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:38,780 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) [2023-12-15 20:51:38,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 20:51:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:38,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 20:51:38,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-12-15 20:51:39,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351969012] [2023-12-15 20:51:39,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320789315] [2023-12-15 20:51:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320789315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:39,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:39,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-12-15 20:51:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420146551] [2023-12-15 20:51:39,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:39,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 20:51:39,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 20:51:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-15 20:51:39,805 INFO L87 Difference]: Start difference. First operand 1747 states and 2544 transitions. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 20:51:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:40,699 INFO L93 Difference]: Finished difference Result 4415 states and 6330 transitions. [2023-12-15 20:51:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 20:51:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 267 [2023-12-15 20:51:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:40,707 INFO L225 Difference]: With dead ends: 4415 [2023-12-15 20:51:40,708 INFO L226 Difference]: Without dead ends: 2657 [2023-12-15 20:51:40,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2023-12-15 20:51:40,711 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 511 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:40,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 786 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 20:51:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2023-12-15 20:51:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1743. [2023-12-15 20:51:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1374 states have (on average 1.3857350800582242) internal successors, (1904), 1386 states have internal predecessors, (1904), 306 states have call successors, (306), 62 states have call predecessors, (306), 62 states have return successors, (306), 294 states have call predecessors, (306), 306 states have call successors, (306) [2023-12-15 20:51:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2516 transitions. [2023-12-15 20:51:40,860 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2516 transitions. Word has length 267 [2023-12-15 20:51:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:40,860 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2516 transitions. [2023-12-15 20:51:40,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-12-15 20:51:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2516 transitions. [2023-12-15 20:51:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:40,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:40,862 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:40,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-15 20:51:41,068 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 [2023-12-15 20:51:41,068 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:41,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -612989532, now seen corresponding path program 1 times [2023-12-15 20:51:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729805860] [2023-12-15 20:51:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:41,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:41,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:41,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443031700] [2023-12-15 20:51:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:41,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:41,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:41,100 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) [2023-12-15 20:51:41,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 20:51:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:41,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-15 20:51:41,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-12-15 20:51:41,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-12-15 20:51:42,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:42,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729805860] [2023-12-15 20:51:42,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:42,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443031700] [2023-12-15 20:51:42,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443031700] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-15 20:51:42,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 20:51:42,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 24 [2023-12-15 20:51:42,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961831845] [2023-12-15 20:51:42,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:51:42,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 20:51:42,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 20:51:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-12-15 20:51:42,478 INFO L87 Difference]: Start difference. First operand 1743 states and 2516 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 2 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2023-12-15 20:51:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:44,611 INFO L93 Difference]: Finished difference Result 6176 states and 8814 transitions. [2023-12-15 20:51:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 20:51:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 2 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 267 [2023-12-15 20:51:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:44,624 INFO L225 Difference]: With dead ends: 6176 [2023-12-15 20:51:44,624 INFO L226 Difference]: Without dead ends: 5010 [2023-12-15 20:51:44,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2023-12-15 20:51:44,627 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 927 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:44,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 1386 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 20:51:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2023-12-15 20:51:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 1738. [2023-12-15 20:51:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1351 states have (on average 1.386380458919319) internal successors, (1873), 1360 states have internal predecessors, (1873), 322 states have call successors, (322), 64 states have call predecessors, (322), 64 states have return successors, (322), 313 states have call predecessors, (322), 322 states have call successors, (322) [2023-12-15 20:51:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2517 transitions. [2023-12-15 20:51:44,805 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2517 transitions. Word has length 267 [2023-12-15 20:51:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:44,805 INFO L495 AbstractCegarLoop]: Abstraction has 1738 states and 2517 transitions. [2023-12-15 20:51:44,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 2 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2023-12-15 20:51:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2517 transitions. [2023-12-15 20:51:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:44,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:44,807 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:44,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:45,027 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 [2023-12-15 20:51:45,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:45,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1364382944, now seen corresponding path program 1 times [2023-12-15 20:51:45,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:45,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783492053] [2023-12-15 20:51:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:45,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:45,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:45,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180955946] [2023-12-15 20:51:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:45,048 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) [2023-12-15 20:51:45,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 20:51:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:45,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-15 20:51:45,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1190 proven. 48 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2023-12-15 20:51:45,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 90 proven. 27 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:45,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:45,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783492053] [2023-12-15 20:51:45,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:45,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180955946] [2023-12-15 20:51:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180955946] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:45,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:45,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2023-12-15 20:51:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391574956] [2023-12-15 20:51:45,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:45,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 20:51:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 20:51:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-15 20:51:45,563 INFO L87 Difference]: Start difference. First operand 1738 states and 2517 transitions. Second operand has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 3 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-12-15 20:51:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:46,881 INFO L93 Difference]: Finished difference Result 6970 states and 9972 transitions. [2023-12-15 20:51:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-15 20:51:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 3 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 267 [2023-12-15 20:51:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:46,896 INFO L225 Difference]: With dead ends: 6970 [2023-12-15 20:51:46,897 INFO L226 Difference]: Without dead ends: 5300 [2023-12-15 20:51:46,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 522 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2023-12-15 20:51:46,900 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1486 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:46,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 942 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 20:51:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2023-12-15 20:51:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 1850. [2023-12-15 20:51:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1455 states have (on average 1.386254295532646) internal successors, (2017), 1464 states have internal predecessors, (2017), 322 states have call successors, (322), 72 states have call predecessors, (322), 72 states have return successors, (322), 313 states have call predecessors, (322), 322 states have call successors, (322) [2023-12-15 20:51:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2661 transitions. [2023-12-15 20:51:47,125 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2661 transitions. Word has length 267 [2023-12-15 20:51:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:47,125 INFO L495 AbstractCegarLoop]: Abstraction has 1850 states and 2661 transitions. [2023-12-15 20:51:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 3 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-12-15 20:51:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2661 transitions. [2023-12-15 20:51:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-15 20:51:47,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:47,131 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:47,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:47,336 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 [2023-12-15 20:51:47,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:47,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash 520377442, now seen corresponding path program 1 times [2023-12-15 20:51:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:47,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498039130] [2023-12-15 20:51:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:47,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:47,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231946943] [2023-12-15 20:51:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:47,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:47,355 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) [2023-12-15 20:51:47,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 20:51:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:47,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-15 20:51:47,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1520 proven. 378 refuted. 0 times theorem prover too weak. 1222 trivial. 0 not checked. [2023-12-15 20:51:48,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 2778 trivial. 0 not checked. [2023-12-15 20:51:48,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:48,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498039130] [2023-12-15 20:51:48,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:48,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231946943] [2023-12-15 20:51:48,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231946943] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:48,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:48,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-12-15 20:51:48,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432102342] [2023-12-15 20:51:48,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:48,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-15 20:51:48,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-15 20:51:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2023-12-15 20:51:48,862 INFO L87 Difference]: Start difference. First operand 1850 states and 2661 transitions. Second operand has 29 states, 28 states have (on average 4.714285714285714) internal successors, (132), 26 states have internal predecessors, (132), 8 states have call successors, (68), 5 states have call predecessors, (68), 10 states have return successors, (70), 8 states have call predecessors, (70), 8 states have call successors, (70) [2023-12-15 20:51:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:51,108 INFO L93 Difference]: Finished difference Result 3168 states and 4408 transitions. [2023-12-15 20:51:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-15 20:51:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.714285714285714) internal successors, (132), 26 states have internal predecessors, (132), 8 states have call successors, (68), 5 states have call predecessors, (68), 10 states have return successors, (70), 8 states have call predecessors, (70), 8 states have call successors, (70) Word has length 267 [2023-12-15 20:51:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:51,114 INFO L225 Difference]: With dead ends: 3168 [2023-12-15 20:51:51,114 INFO L226 Difference]: Without dead ends: 2030 [2023-12-15 20:51:51,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1397, Invalid=4455, Unknown=0, NotChecked=0, Total=5852 [2023-12-15 20:51:51,117 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1008 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:51,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 1656 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 20:51:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2023-12-15 20:51:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1838. [2023-12-15 20:51:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1438 states have (on average 1.3560500695410291) internal successors, (1950), 1447 states have internal predecessors, (1950), 298 states have call successors, (298), 101 states have call predecessors, (298), 101 states have return successors, (298), 289 states have call predecessors, (298), 298 states have call successors, (298) [2023-12-15 20:51:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 2546 transitions. [2023-12-15 20:51:51,299 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 2546 transitions. Word has length 267 [2023-12-15 20:51:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:51,299 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 2546 transitions. [2023-12-15 20:51:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.714285714285714) internal successors, (132), 26 states have internal predecessors, (132), 8 states have call successors, (68), 5 states have call predecessors, (68), 10 states have return successors, (70), 8 states have call predecessors, (70), 8 states have call successors, (70) [2023-12-15 20:51:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 2546 transitions. [2023-12-15 20:51:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-12-15 20:51:51,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:51,301 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:51,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:51,506 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 [2023-12-15 20:51:51,507 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:51,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash -832601388, now seen corresponding path program 1 times [2023-12-15 20:51:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799970620] [2023-12-15 20:51:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:51,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271380933] [2023-12-15 20:51:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:51,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:51,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:51,525 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) [2023-12-15 20:51:51,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 20:51:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:51,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 20:51:51,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 477 proven. 108 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2023-12-15 20:51:52,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:51:52,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799970620] [2023-12-15 20:51:52,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271380933] [2023-12-15 20:51:52,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271380933] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:52,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:52,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-15 20:51:52,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774103592] [2023-12-15 20:51:52,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 20:51:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 20:51:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-15 20:51:52,482 INFO L87 Difference]: Start difference. First operand 1838 states and 2546 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 4 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-12-15 20:51:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:51:53,331 INFO L93 Difference]: Finished difference Result 4198 states and 5865 transitions. [2023-12-15 20:51:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 20:51:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 4 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) Word has length 268 [2023-12-15 20:51:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:51:53,337 INFO L225 Difference]: With dead ends: 4198 [2023-12-15 20:51:53,337 INFO L226 Difference]: Without dead ends: 2448 [2023-12-15 20:51:53,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-12-15 20:51:53,339 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 454 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 20:51:53,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 671 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 20:51:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2023-12-15 20:51:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2146. [2023-12-15 20:51:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 1730 states have (on average 1.3745664739884393) internal successors, (2378), 1743 states have internal predecessors, (2378), 310 states have call successors, (310), 105 states have call predecessors, (310), 105 states have return successors, (310), 297 states have call predecessors, (310), 310 states have call successors, (310) [2023-12-15 20:51:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 2998 transitions. [2023-12-15 20:51:53,534 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 2998 transitions. Word has length 268 [2023-12-15 20:51:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:51:53,534 INFO L495 AbstractCegarLoop]: Abstraction has 2146 states and 2998 transitions. [2023-12-15 20:51:53,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 4 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 4 states have call predecessors, (80), 4 states have call successors, (80) [2023-12-15 20:51:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 2998 transitions. [2023-12-15 20:51:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-12-15 20:51:53,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:51:53,537 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:51:53,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 20:51:53,743 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 [2023-12-15 20:51:53,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:51:53,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:51:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash -966614894, now seen corresponding path program 1 times [2023-12-15 20:51:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:51:53,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336577522] [2023-12-15 20:51:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:51:53,764 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:51:53,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476104355] [2023-12-15 20:51:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:51:53,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:51:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:51:53,780 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) [2023-12-15 20:51:53,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 20:51:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:51:53,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 20:51:53,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:51:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1985 proven. 87 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2023-12-15 20:51:54,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:51:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 246 proven. 96 refuted. 0 times theorem prover too weak. 2778 trivial. 0 not checked. [2023-12-15 20:51:55,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:51:55,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336577522] [2023-12-15 20:51:55,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:51:55,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476104355] [2023-12-15 20:51:55,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476104355] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:51:55,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:51:55,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-12-15 20:51:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606557248] [2023-12-15 20:51:55,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:51:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-15 20:51:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:51:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-15 20:51:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2023-12-15 20:51:55,297 INFO L87 Difference]: Start difference. First operand 2146 states and 2998 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 20 states have internal predecessors, (126), 7 states have call successors, (61), 4 states have call predecessors, (61), 9 states have return successors, (62), 7 states have call predecessors, (62), 7 states have call successors, (62) [2023-12-15 20:51:59,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-15 20:52:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:52:12,493 INFO L93 Difference]: Finished difference Result 5264 states and 7289 transitions. [2023-12-15 20:52:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 20:52:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 20 states have internal predecessors, (126), 7 states have call successors, (61), 4 states have call predecessors, (61), 9 states have return successors, (62), 7 states have call predecessors, (62), 7 states have call successors, (62) Word has length 268 [2023-12-15 20:52:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:52:12,500 INFO L225 Difference]: With dead ends: 5264 [2023-12-15 20:52:12,500 INFO L226 Difference]: Without dead ends: 3206 [2023-12-15 20:52:12,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=821, Invalid=2040, Unknown=1, NotChecked=0, Total=2862 [2023-12-15 20:52:12,504 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1241 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 328 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-15 20:52:12,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 1189 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1390 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2023-12-15 20:52:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2023-12-15 20:52:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 589. [2023-12-15 20:52:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 472 states have (on average 1.3347457627118644) internal successors, (630), 472 states have internal predecessors, (630), 80 states have call successors, (80), 36 states have call predecessors, (80), 36 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-12-15 20:52:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 790 transitions. [2023-12-15 20:52:12,617 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 790 transitions. Word has length 268 [2023-12-15 20:52:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:52:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 790 transitions. [2023-12-15 20:52:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 20 states have internal predecessors, (126), 7 states have call successors, (61), 4 states have call predecessors, (61), 9 states have return successors, (62), 7 states have call predecessors, (62), 7 states have call successors, (62) [2023-12-15 20:52:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 790 transitions. [2023-12-15 20:52:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-12-15 20:52:12,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:52:12,619 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:52:12,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 20:52:12,826 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 [2023-12-15 20:52:12,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:52:12,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:52:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash -96811159, now seen corresponding path program 1 times [2023-12-15 20:52:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:52:12,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927717442] [2023-12-15 20:52:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:52:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:52:12,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:52:12,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348024069] [2023-12-15 20:52:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:52:12,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:52:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:52:12,877 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) [2023-12-15 20:52:12,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 20:52:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:52:13,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-15 20:52:13,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:52:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1503 proven. 132 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2023-12-15 20:52:14,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:52:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2023-12-15 20:52:15,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:52:15,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927717442] [2023-12-15 20:52:15,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:52:15,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348024069] [2023-12-15 20:52:15,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348024069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:52:15,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:52:15,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-12-15 20:52:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107809305] [2023-12-15 20:52:15,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:52:15,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 20:52:15,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:52:15,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 20:52:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-12-15 20:52:15,119 INFO L87 Difference]: Start difference. First operand 589 states and 790 transitions. Second operand has 24 states, 24 states have (on average 6.083333333333333) internal successors, (146), 24 states have internal predecessors, (146), 5 states have call successors, (80), 4 states have call predecessors, (80), 7 states have return successors, (80), 5 states have call predecessors, (80), 5 states have call successors, (80) [2023-12-15 20:52:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:52:20,436 INFO L93 Difference]: Finished difference Result 4576 states and 6191 transitions. [2023-12-15 20:52:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-15 20:52:20,437 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.083333333333333) internal successors, (146), 24 states have internal predecessors, (146), 5 states have call successors, (80), 4 states have call predecessors, (80), 7 states have return successors, (80), 5 states have call predecessors, (80), 5 states have call successors, (80) Word has length 269 [2023-12-15 20:52:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:52:20,448 INFO L225 Difference]: With dead ends: 4576 [2023-12-15 20:52:20,448 INFO L226 Difference]: Without dead ends: 3964 [2023-12-15 20:52:20,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 527 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1548, Invalid=6108, Unknown=0, NotChecked=0, Total=7656 [2023-12-15 20:52:20,467 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 2352 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 3263 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2360 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 3263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:52:20,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2360 Valid, 2839 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 3263 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-15 20:52:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2023-12-15 20:52:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 1523. [2023-12-15 20:52:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1288 states have (on average 1.3866459627329193) internal successors, (1786), 1288 states have internal predecessors, (1786), 160 states have call successors, (160), 74 states have call predecessors, (160), 74 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-12-15 20:52:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2106 transitions. [2023-12-15 20:52:20,716 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2106 transitions. Word has length 269 [2023-12-15 20:52:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:52:20,717 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 2106 transitions. [2023-12-15 20:52:20,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.083333333333333) internal successors, (146), 24 states have internal predecessors, (146), 5 states have call successors, (80), 4 states have call predecessors, (80), 7 states have return successors, (80), 5 states have call predecessors, (80), 5 states have call successors, (80) [2023-12-15 20:52:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2106 transitions. [2023-12-15 20:52:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-12-15 20:52:20,718 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:52:20,719 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:52:20,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 20:52:20,925 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 [2023-12-15 20:52:20,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:52:20,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:52:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1289392235, now seen corresponding path program 1 times [2023-12-15 20:52:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:52:20,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440594472] [2023-12-15 20:52:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:52:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:52:20,951 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:52:20,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654247784] [2023-12-15 20:52:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:52:20,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:52:20,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:52:20,959 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) [2023-12-15 20:52:20,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 20:52:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:52:21,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-15 20:52:21,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:52:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 2096 proven. 309 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-12-15 20:52:23,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:52:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 105 proven. 237 refuted. 0 times theorem prover too weak. 2778 trivial. 0 not checked. [2023-12-15 20:52:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:52:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440594472] [2023-12-15 20:52:24,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:52:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654247784] [2023-12-15 20:52:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654247784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 20:52:24,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 20:52:24,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2023-12-15 20:52:24,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631152135] [2023-12-15 20:52:24,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 20:52:24,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-15 20:52:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:52:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-15 20:52:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2023-12-15 20:52:24,933 INFO L87 Difference]: Start difference. First operand 1523 states and 2106 transitions. Second operand has 42 states, 40 states have (on average 4.1) internal successors, (164), 38 states have internal predecessors, (164), 11 states have call successors, (80), 7 states have call predecessors, (80), 13 states have return successors, (80), 11 states have call predecessors, (80), 11 states have call successors, (80) Received shutdown request... [2023-12-15 20:52:32,209 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 20:52:32,209 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 [2023-12-15 20:52:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-12-15 20:52:32,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5088, Invalid=15504, Unknown=0, NotChecked=0, Total=20592 [2023-12-15 20:52:32,214 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 4545 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4546 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:52:32,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4546 Valid, 1571 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-15 20:52:32,215 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 20:52:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 20:52:32,421 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 [2023-12-15 20:52:32,422 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (1523states) and FLOYD_HOARE automaton (currently 116 states, 42 states before enhancement),while ReachableStatesComputation was computing reachable states (3741 states constructed, input type IntersectNwa). [2023-12-15 20:52:32,425 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:52:32,427 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 20:52:32,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 08:52:32 BoogieIcfgContainer [2023-12-15 20:52:32,429 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 20:52:32,429 INFO L158 Benchmark]: Toolchain (without parser) took 65964.47ms. Allocated memory was 252.7MB in the beginning and 722.5MB in the end (delta: 469.8MB). Free memory was 206.2MB in the beginning and 506.9MB in the end (delta: -300.6MB). Peak memory consumption was 433.1MB. Max. memory is 8.0GB. [2023-12-15 20:52:32,429 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory was 147.8MB in the beginning and 147.7MB in the end (delta: 86.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 20:52:32,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.58ms. Allocated memory is still 252.7MB. Free memory was 206.2MB in the beginning and 188.4MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-15 20:52:32,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.53ms. Allocated memory is still 252.7MB. Free memory was 188.4MB in the beginning and 181.6MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2023-12-15 20:52:32,429 INFO L158 Benchmark]: Boogie Preprocessor took 66.82ms. Allocated memory is still 252.7MB. Free memory was 181.6MB in the beginning and 172.7MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-15 20:52:32,430 INFO L158 Benchmark]: RCFGBuilder took 605.36ms. Allocated memory is still 252.7MB. Free memory was 172.7MB in the beginning and 209.0MB in the end (delta: -36.3MB). Peak memory consumption was 48.1MB. Max. memory is 8.0GB. [2023-12-15 20:52:32,430 INFO L158 Benchmark]: TraceAbstraction took 64976.57ms. Allocated memory was 252.7MB in the beginning and 722.5MB in the end (delta: 469.8MB). Free memory was 208.4MB in the beginning and 506.9MB in the end (delta: -298.4MB). Peak memory consumption was 434.3MB. Max. memory is 8.0GB. [2023-12-15 20:52:32,431 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory was 147.8MB in the beginning and 147.7MB in the end (delta: 86.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 264.58ms. Allocated memory is still 252.7MB. Free memory was 206.2MB in the beginning and 188.4MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.53ms. Allocated memory is still 252.7MB. Free memory was 188.4MB in the beginning and 181.6MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 66.82ms. Allocated memory is still 252.7MB. Free memory was 181.6MB in the beginning and 172.7MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * RCFGBuilder took 605.36ms. Allocated memory is still 252.7MB. Free memory was 172.7MB in the beginning and 209.0MB in the end (delta: -36.3MB). Peak memory consumption was 48.1MB. Max. memory is 8.0GB. * TraceAbstraction took 64976.57ms. Allocated memory was 252.7MB in the beginning and 722.5MB in the end (delta: 469.8MB). Free memory was 208.4MB in the beginning and 506.9MB in the end (delta: -298.4MB). Peak memory consumption was 434.3MB. 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: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was constructing difference of abstraction (1523states) and FLOYD_HOARE automaton (currently 116 states, 42 states before enhancement),while ReachableStatesComputation was computing reachable states (3741 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 143 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 64.9s, OverallIterations: 17, TraceHistogramMax: 40, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 41.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 15424 SdHoareTripleChecker+Valid, 19.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15305 mSDsluCounter, 16585 SdHoareTripleChecker+Invalid, 17.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12908 mSDsCounter, 3965 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17304 IncrementalHoareTripleChecker+Invalid, 21270 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3965 mSolverCounterUnsat, 3677 mSDtfsCounter, 17304 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8662 GetRequests, 8084 SyntacticMatches, 6 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12313 ImplicationChecksByTransitivity, 19.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2146occurred in iteration=14, InterpolantAutomatonStates: 336, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 16 MinimizatonAttempts, 16374 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 4802 NumberOfCodeBlocks, 4802 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 8246 ConstructedInterpolants, 0 QuantifiedInterpolants, 43270 SizeOfPredicates, 127 NumberOfNonLiveVariables, 10276 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 31 InterpolantComputations, 5 PerfectInterpolantSequences, 93612/96720 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