/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_operatoramount_amount250_file-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 12:55:01,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 12:55:02,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 12:55:02,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 12:55:02,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 12:55:02,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 12:55:02,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 12:55:02,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 12:55:02,077 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 12:55:02,077 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 12:55:02,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 12:55:02,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 12:55:02,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 12:55:02,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 12:55:02,078 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 12:55:02,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 12:55:02,079 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 12:55:02,079 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 12:55:02,079 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 12:55:02,080 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 12:55:02,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 12:55:02,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 12:55:02,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 12:55:02,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 12:55:02,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 12:55:02,090 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 12:55:02,090 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 12:55:02,090 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 12:55:02,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 12:55:02,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 12:55:02,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 12:55:02,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 12:55:02,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 12:55:02,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 12:55:02,092 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 12:55:02,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 12:55:02,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 12:55:02,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 12:55:02,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 12:55:02,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 12:55:02,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 12:55:02,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 12:55:02,265 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 12:55:02,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount250_file-5.i [2023-12-19 12:55:03,349 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 12:55:03,517 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 12:55:03,518 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount250_file-5.i [2023-12-19 12:55:03,525 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e179e70d0/d3f6acf9ea6b41e99c037f4c5c5c2b69/FLAGa01d0a2af [2023-12-19 12:55:03,535 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e179e70d0/d3f6acf9ea6b41e99c037f4c5c5c2b69 [2023-12-19 12:55:03,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 12:55:03,537 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 12:55:03,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 12:55:03,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 12:55:03,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 12:55:03,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:03,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657a4303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03, skipping insertion in model container [2023-12-19 12:55:03,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:03,587 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 12:55:03,719 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_operatoramount_amount250_file-5.i[915,928] [2023-12-19 12:55:03,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 12:55:03,873 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 12:55:03,881 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_operatoramount_amount250_file-5.i[915,928] [2023-12-19 12:55:03,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 12:55:03,960 INFO L206 MainTranslator]: Completed translation [2023-12-19 12:55:03,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03 WrapperNode [2023-12-19 12:55:03,960 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 12:55:03,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 12:55:03,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 12:55:03,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 12:55:03,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,067 INFO L138 Inliner]: procedures = 26, calls = 48, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 431 [2023-12-19 12:55:04,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 12:55:04,068 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 12:55:04,068 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 12:55:04,068 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 12:55:04,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,144 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]. [2023-12-19 12:55:04,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,144 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,168 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 12:55:04,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 12:55:04,189 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 12:55:04,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 12:55:04,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (1/1) ... [2023-12-19 12:55:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 12:55:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:04,232 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) [2023-12-19 12:55:04,238 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 [2023-12-19 12:55:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 12:55:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 12:55:04,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 12:55:04,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 12:55:04,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 12:55:04,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 12:55:04,347 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 12:55:04,348 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 12:55:04,796 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 12:55:04,829 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 12:55:04,830 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 12:55:04,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 12:55:04 BoogieIcfgContainer [2023-12-19 12:55:04,830 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 12:55:04,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 12:55:04,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 12:55:04,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 12:55:04,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 12:55:03" (1/3) ... [2023-12-19 12:55:04,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70966930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 12:55:04, skipping insertion in model container [2023-12-19 12:55:04,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 12:55:03" (2/3) ... [2023-12-19 12:55:04,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70966930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 12:55:04, skipping insertion in model container [2023-12-19 12:55:04,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 12:55:04" (3/3) ... [2023-12-19 12:55:04,837 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-5.i [2023-12-19 12:55:04,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 12:55:04,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 12:55:04,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 12:55:04,898 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;@39e87e23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 12:55:04,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 12:55:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 117 states have (on average 1.606837606837607) internal successors, (188), 118 states have internal predecessors, (188), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-12-19 12:55:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-19 12:55:04,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:04,929 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:04,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:04,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1217408690, now seen corresponding path program 1 times [2023-12-19 12:55:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:04,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476646936] [2023-12-19 12:55:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:05,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:05,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476646936] [2023-12-19 12:55:05,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 12:55:05,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928903254] [2023-12-19 12:55:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:05,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:05,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:05,190 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) [2023-12-19 12:55:05,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 12:55:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:05,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 12:55:05,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2023-12-19 12:55:05,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:05,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928903254] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:05,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:05,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 12:55:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326147911] [2023-12-19 12:55:05,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:05,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 12:55:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 12:55:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 12:55:05,496 INFO L87 Difference]: Start difference. First operand has 155 states, 117 states have (on average 1.606837606837607) internal successors, (188), 118 states have internal predecessors, (188), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 2 states have call successors, (35) [2023-12-19 12:55:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:05,536 INFO L93 Difference]: Finished difference Result 307 states and 549 transitions. [2023-12-19 12:55:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 12:55:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 2 states have call successors, (35) Word has length 245 [2023-12-19 12:55:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:05,544 INFO L225 Difference]: With dead ends: 307 [2023-12-19 12:55:05,544 INFO L226 Difference]: Without dead ends: 153 [2023-12-19 12:55:05,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 12:55:05,548 INFO L413 NwaCegarLoop]: 248 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, 248 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 [2023-12-19 12:55:05,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 248 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 12:55:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-19 12:55:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-12-19 12:55:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 116 states have (on average 1.5603448275862069) internal successors, (181), 116 states have internal predecessors, (181), 35 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-12-19 12:55:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 251 transitions. [2023-12-19 12:55:05,585 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 251 transitions. Word has length 245 [2023-12-19 12:55:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:05,585 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 251 transitions. [2023-12-19 12:55:05,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 2 states have call successors, (35) [2023-12-19 12:55:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 251 transitions. [2023-12-19 12:55:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-19 12:55:05,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:05,627 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:05,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:05,833 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 [2023-12-19 12:55:05,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:05,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 938391594, now seen corresponding path program 1 times [2023-12-19 12:55:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:05,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105720746] [2023-12-19 12:55:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:05,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541818600] [2023-12-19 12:55:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:05,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:05,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:05,918 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) [2023-12-19 12:55:05,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 12:55:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:06,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 12:55:06,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:06,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:06,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:06,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105720746] [2023-12-19 12:55:06,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541818600] [2023-12-19 12:55:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541818600] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:06,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 12:55:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531513843] [2023-12-19 12:55:06,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:06,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 12:55:06,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:06,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 12:55:06,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 12:55:06,670 INFO L87 Difference]: Start difference. First operand 153 states and 251 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:06,992 INFO L93 Difference]: Finished difference Result 512 states and 849 transitions. [2023-12-19 12:55:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 12:55:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 245 [2023-12-19 12:55:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:06,998 INFO L225 Difference]: With dead ends: 512 [2023-12-19 12:55:06,998 INFO L226 Difference]: Without dead ends: 360 [2023-12-19 12:55:07,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 12:55:07,002 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 362 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 971 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 12:55:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-19 12:55:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 230. [2023-12-19 12:55:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 157 states have (on average 1.4713375796178343) internal successors, (231), 157 states have internal predecessors, (231), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2023-12-19 12:55:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 371 transitions. [2023-12-19 12:55:07,079 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 371 transitions. Word has length 245 [2023-12-19 12:55:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:07,083 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 371 transitions. [2023-12-19 12:55:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 371 transitions. [2023-12-19 12:55:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-19 12:55:07,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:07,087 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:07,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:07,293 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 [2023-12-19 12:55:07,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:07,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 421583394, now seen corresponding path program 1 times [2023-12-19 12:55:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:07,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060430919] [2023-12-19 12:55:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:07,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:07,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030079784] [2023-12-19 12:55:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:07,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:07,349 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) [2023-12-19 12:55:07,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 12:55:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:07,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 12:55:07,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:07,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:07,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:07,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060430919] [2023-12-19 12:55:07,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:07,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030079784] [2023-12-19 12:55:07,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030079784] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:07,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:07,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 12:55:07,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778041172] [2023-12-19 12:55:07,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:07,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 12:55:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 12:55:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 12:55:07,597 INFO L87 Difference]: Start difference. First operand 230 states and 371 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:07,899 INFO L93 Difference]: Finished difference Result 714 states and 1152 transitions. [2023-12-19 12:55:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 12:55:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 245 [2023-12-19 12:55:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:07,903 INFO L225 Difference]: With dead ends: 714 [2023-12-19 12:55:07,903 INFO L226 Difference]: Without dead ends: 562 [2023-12-19 12:55:07,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 12:55:07,904 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 525 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:07,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 722 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 12:55:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-12-19 12:55:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 408. [2023-12-19 12:55:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 315 states have (on average 1.5492063492063493) internal successors, (488), 316 states have internal predecessors, (488), 88 states have call successors, (88), 4 states have call predecessors, (88), 4 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-19 12:55:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 664 transitions. [2023-12-19 12:55:07,935 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 664 transitions. Word has length 245 [2023-12-19 12:55:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:07,937 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 664 transitions. [2023-12-19 12:55:07,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 664 transitions. [2023-12-19 12:55:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-12-19 12:55:07,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:07,940 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:07,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:08,144 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 [2023-12-19 12:55:08,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:08,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1303326140, now seen corresponding path program 1 times [2023-12-19 12:55:08,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086098819] [2023-12-19 12:55:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:08,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:08,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733428048] [2023-12-19 12:55:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:08,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:08,194 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) [2023-12-19 12:55:08,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 12:55:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:08,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 12:55:08,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:08,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:08,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086098819] [2023-12-19 12:55:08,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733428048] [2023-12-19 12:55:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733428048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:08,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:08,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 12:55:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361495234] [2023-12-19 12:55:08,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:08,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 12:55:08,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 12:55:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-19 12:55:08,851 INFO L87 Difference]: Start difference. First operand 408 states and 664 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:09,055 INFO L93 Difference]: Finished difference Result 956 states and 1581 transitions. [2023-12-19 12:55:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 12:55:09,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 246 [2023-12-19 12:55:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:09,059 INFO L225 Difference]: With dead ends: 956 [2023-12-19 12:55:09,059 INFO L226 Difference]: Without dead ends: 623 [2023-12-19 12:55:09,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-19 12:55:09,060 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 431 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:09,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 943 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 12:55:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-12-19 12:55:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 408. [2023-12-19 12:55:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 315 states have (on average 1.542857142857143) internal successors, (486), 316 states have internal predecessors, (486), 88 states have call successors, (88), 4 states have call predecessors, (88), 4 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-19 12:55:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 662 transitions. [2023-12-19 12:55:09,095 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 662 transitions. Word has length 246 [2023-12-19 12:55:09,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:09,096 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 662 transitions. [2023-12-19 12:55:09,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 662 transitions. [2023-12-19 12:55:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-12-19 12:55:09,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:09,098 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:09,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:09,305 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 [2023-12-19 12:55:09,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:09,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2113893839, now seen corresponding path program 1 times [2023-12-19 12:55:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:09,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913908996] [2023-12-19 12:55:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:09,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:09,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:09,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059914634] [2023-12-19 12:55:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:09,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:09,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:09,361 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) [2023-12-19 12:55:09,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 12:55:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:09,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 12:55:09,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:09,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913908996] [2023-12-19 12:55:09,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059914634] [2023-12-19 12:55:09,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059914634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:09,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:09,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 12:55:09,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810067426] [2023-12-19 12:55:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 12:55:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:09,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 12:55:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-19 12:55:09,859 INFO L87 Difference]: Start difference. First operand 408 states and 662 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:10,270 INFO L93 Difference]: Finished difference Result 1238 states and 2059 transitions. [2023-12-19 12:55:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 12:55:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 247 [2023-12-19 12:55:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:10,273 INFO L225 Difference]: With dead ends: 1238 [2023-12-19 12:55:10,274 INFO L226 Difference]: Without dead ends: 912 [2023-12-19 12:55:10,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-19 12:55:10,275 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 630 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:10,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1266 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 12:55:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-12-19 12:55:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 796. [2023-12-19 12:55:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 703 states have (on average 1.6173541963015647) internal successors, (1137), 704 states have internal predecessors, (1137), 88 states have call successors, (88), 4 states have call predecessors, (88), 4 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-19 12:55:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1313 transitions. [2023-12-19 12:55:10,297 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1313 transitions. Word has length 247 [2023-12-19 12:55:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:10,298 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1313 transitions. [2023-12-19 12:55:10,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1313 transitions. [2023-12-19 12:55:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:10,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:10,300 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:10,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:10,506 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 [2023-12-19 12:55:10,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:10,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash -850998566, now seen corresponding path program 1 times [2023-12-19 12:55:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054726879] [2023-12-19 12:55:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:10,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:10,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788872498] [2023-12-19 12:55:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:10,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:10,535 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) [2023-12-19 12:55:10,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 12:55:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:10,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 12:55:10,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1212 proven. 45 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2023-12-19 12:55:10,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:55:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-12-19 12:55:11,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:11,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054726879] [2023-12-19 12:55:11,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:11,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788872498] [2023-12-19 12:55:11,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788872498] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:55:11,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:55:11,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 12:55:11,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555938709] [2023-12-19 12:55:11,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:55:11,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 12:55:11,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 12:55:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 12:55:11,015 INFO L87 Difference]: Start difference. First operand 796 states and 1313 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-12-19 12:55:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:11,205 INFO L93 Difference]: Finished difference Result 1338 states and 2189 transitions. [2023-12-19 12:55:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 12:55:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 248 [2023-12-19 12:55:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:11,208 INFO L225 Difference]: With dead ends: 1338 [2023-12-19 12:55:11,208 INFO L226 Difference]: Without dead ends: 657 [2023-12-19 12:55:11,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 488 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 12:55:11,210 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 164 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:11,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 510 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 12:55:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-12-19 12:55:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 645. [2023-12-19 12:55:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 550 states have (on average 1.5672727272727274) internal successors, (862), 551 states have internal predecessors, (862), 88 states have call successors, (88), 6 states have call predecessors, (88), 6 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-19 12:55:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1038 transitions. [2023-12-19 12:55:11,229 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1038 transitions. Word has length 248 [2023-12-19 12:55:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:11,230 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 1038 transitions. [2023-12-19 12:55:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-12-19 12:55:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1038 transitions. [2023-12-19 12:55:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:11,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:11,232 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:11,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:11,438 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 [2023-12-19 12:55:11,439 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:11,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2134018527, now seen corresponding path program 1 times [2023-12-19 12:55:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:11,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989081822] [2023-12-19 12:55:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:11,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:11,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:11,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086233986] [2023-12-19 12:55:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:11,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:11,464 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) [2023-12-19 12:55:11,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 12:55:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:11,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 12:55:11,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:12,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:12,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989081822] [2023-12-19 12:55:12,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086233986] [2023-12-19 12:55:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086233986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:12,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:12,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-19 12:55:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661400027] [2023-12-19 12:55:12,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 12:55:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 12:55:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-19 12:55:12,026 INFO L87 Difference]: Start difference. First operand 645 states and 1038 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:13,192 INFO L93 Difference]: Finished difference Result 3462 states and 5448 transitions. [2023-12-19 12:55:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 12:55:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 248 [2023-12-19 12:55:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:13,204 INFO L225 Difference]: With dead ends: 3462 [2023-12-19 12:55:13,209 INFO L226 Difference]: Without dead ends: 3033 [2023-12-19 12:55:13,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2023-12-19 12:55:13,212 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 3155 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3155 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:13,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3155 Valid, 2097 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 12:55:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2023-12-19 12:55:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 1649. [2023-12-19 12:55:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1511 states have (on average 1.5943084050297816) internal successors, (2409), 1514 states have internal predecessors, (2409), 128 states have call successors, (128), 9 states have call predecessors, (128), 9 states have return successors, (128), 125 states have call predecessors, (128), 128 states have call successors, (128) [2023-12-19 12:55:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2665 transitions. [2023-12-19 12:55:13,276 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2665 transitions. Word has length 248 [2023-12-19 12:55:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:13,276 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2665 transitions. [2023-12-19 12:55:13,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2665 transitions. [2023-12-19 12:55:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:13,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:13,280 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:13,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 12:55:13,485 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 [2023-12-19 12:55:13,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:13,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1651201226, now seen corresponding path program 1 times [2023-12-19 12:55:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333906804] [2023-12-19 12:55:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:13,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:13,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679973999] [2023-12-19 12:55:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:13,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:13,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:13,528 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) [2023-12-19 12:55:13,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 12:55:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:13,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 12:55:13,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:14,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333906804] [2023-12-19 12:55:14,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679973999] [2023-12-19 12:55:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679973999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:14,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:14,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-19 12:55:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269876965] [2023-12-19 12:55:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 12:55:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 12:55:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-19 12:55:14,120 INFO L87 Difference]: Start difference. First operand 1649 states and 2665 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:15,096 INFO L93 Difference]: Finished difference Result 2995 states and 4739 transitions. [2023-12-19 12:55:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 12:55:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 248 [2023-12-19 12:55:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:15,105 INFO L225 Difference]: With dead ends: 2995 [2023-12-19 12:55:15,105 INFO L226 Difference]: Without dead ends: 2270 [2023-12-19 12:55:15,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2023-12-19 12:55:15,108 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 2494 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2494 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:15,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2494 Valid, 1662 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 12:55:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2023-12-19 12:55:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1765. [2023-12-19 12:55:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1602 states have (on average 1.587390761548065) internal successors, (2543), 1606 states have internal predecessors, (2543), 150 states have call successors, (150), 12 states have call predecessors, (150), 12 states have return successors, (150), 146 states have call predecessors, (150), 150 states have call successors, (150) [2023-12-19 12:55:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2843 transitions. [2023-12-19 12:55:15,157 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2843 transitions. Word has length 248 [2023-12-19 12:55:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:15,157 INFO L495 AbstractCegarLoop]: Abstraction has 1765 states and 2843 transitions. [2023-12-19 12:55:15,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2843 transitions. [2023-12-19 12:55:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:15,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:15,162 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:15,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 12:55:15,367 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 [2023-12-19 12:55:15,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:15,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash 109581601, now seen corresponding path program 1 times [2023-12-19 12:55:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:15,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315441523] [2023-12-19 12:55:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:15,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:15,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72397789] [2023-12-19 12:55:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:15,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:15,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:15,400 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) [2023-12-19 12:55:15,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 12:55:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:15,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 12:55:15,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1134 proven. 36 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2023-12-19 12:55:16,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:55:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-12-19 12:55:16,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:16,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315441523] [2023-12-19 12:55:16,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72397789] [2023-12-19 12:55:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72397789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:55:16,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:55:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2023-12-19 12:55:16,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139184522] [2023-12-19 12:55:16,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:55:16,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 12:55:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 12:55:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-12-19 12:55:16,367 INFO L87 Difference]: Start difference. First operand 1765 states and 2843 transitions. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-12-19 12:55:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:18,388 INFO L93 Difference]: Finished difference Result 5530 states and 8707 transitions. [2023-12-19 12:55:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-19 12:55:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 248 [2023-12-19 12:55:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:18,405 INFO L225 Difference]: With dead ends: 5530 [2023-12-19 12:55:18,405 INFO L226 Difference]: Without dead ends: 4559 [2023-12-19 12:55:18,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 487 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 12:55:18,410 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 3404 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:18,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 2400 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 12:55:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2023-12-19 12:55:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3566. [2023-12-19 12:55:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3215 states have (on average 1.585692068429238) internal successors, (5098), 3227 states have internal predecessors, (5098), 319 states have call successors, (319), 31 states have call predecessors, (319), 31 states have return successors, (319), 307 states have call predecessors, (319), 319 states have call successors, (319) [2023-12-19 12:55:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 5736 transitions. [2023-12-19 12:55:18,532 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 5736 transitions. Word has length 248 [2023-12-19 12:55:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:18,533 INFO L495 AbstractCegarLoop]: Abstraction has 3566 states and 5736 transitions. [2023-12-19 12:55:18,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-12-19 12:55:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 5736 transitions. [2023-12-19 12:55:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:18,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:18,537 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:18,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-19 12:55:18,755 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 [2023-12-19 12:55:18,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:18,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 297040161, now seen corresponding path program 1 times [2023-12-19 12:55:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97953664] [2023-12-19 12:55:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:18,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:18,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:18,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843753977] [2023-12-19 12:55:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:18,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:18,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:18,783 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) [2023-12-19 12:55:18,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 12:55:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:18,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 12:55:19,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:19,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:19,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:19,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97953664] [2023-12-19 12:55:19,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:19,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843753977] [2023-12-19 12:55:19,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843753977] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:19,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:19,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 12:55:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429271084] [2023-12-19 12:55:19,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:19,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 12:55:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 12:55:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-19 12:55:19,428 INFO L87 Difference]: Start difference. First operand 3566 states and 5736 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:19,786 INFO L93 Difference]: Finished difference Result 9297 states and 14865 transitions. [2023-12-19 12:55:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 12:55:19,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 248 [2023-12-19 12:55:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:19,806 INFO L225 Difference]: With dead ends: 9297 [2023-12-19 12:55:19,806 INFO L226 Difference]: Without dead ends: 6309 [2023-12-19 12:55:19,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-12-19 12:55:19,812 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 977 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:19,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 1024 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 12:55:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6309 states. [2023-12-19 12:55:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6309 to 4376. [2023-12-19 12:55:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4376 states, 4025 states have (on average 1.5972670807453415) internal successors, (6429), 4037 states have internal predecessors, (6429), 319 states have call successors, (319), 31 states have call predecessors, (319), 31 states have return successors, (319), 307 states have call predecessors, (319), 319 states have call successors, (319) [2023-12-19 12:55:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 7067 transitions. [2023-12-19 12:55:20,002 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 7067 transitions. Word has length 248 [2023-12-19 12:55:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:20,003 INFO L495 AbstractCegarLoop]: Abstraction has 4376 states and 7067 transitions. [2023-12-19 12:55:20,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 7067 transitions. [2023-12-19 12:55:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:20,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:20,007 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:20,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:20,213 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 [2023-12-19 12:55:20,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:20,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1316943267, now seen corresponding path program 1 times [2023-12-19 12:55:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:20,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531117696] [2023-12-19 12:55:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:20,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:20,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371456799] [2023-12-19 12:55:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:20,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:20,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:55:20,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 12:55:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:20,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 12:55:20,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:20,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:20,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531117696] [2023-12-19 12:55:20,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371456799] [2023-12-19 12:55:20,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371456799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:20,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:20,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 12:55:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704327550] [2023-12-19 12:55:20,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 12:55:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 12:55:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 12:55:20,727 INFO L87 Difference]: Start difference. First operand 4376 states and 7067 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:21,436 INFO L93 Difference]: Finished difference Result 10402 states and 16447 transitions. [2023-12-19 12:55:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 12:55:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 248 [2023-12-19 12:55:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:21,466 INFO L225 Difference]: With dead ends: 10402 [2023-12-19 12:55:21,466 INFO L226 Difference]: Without dead ends: 7424 [2023-12-19 12:55:21,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-12-19 12:55:21,472 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 1352 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:21,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1807 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 12:55:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7424 states. [2023-12-19 12:55:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7424 to 4642. [2023-12-19 12:55:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4189 states have (on average 1.5636190021484841) internal successors, (6550), 4205 states have internal predecessors, (6550), 409 states have call successors, (409), 43 states have call predecessors, (409), 43 states have return successors, (409), 393 states have call predecessors, (409), 409 states have call successors, (409) [2023-12-19 12:55:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 7368 transitions. [2023-12-19 12:55:21,787 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 7368 transitions. Word has length 248 [2023-12-19 12:55:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:21,787 INFO L495 AbstractCegarLoop]: Abstraction has 4642 states and 7368 transitions. [2023-12-19 12:55:21,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 7368 transitions. [2023-12-19 12:55:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:21,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:21,792 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:21,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:21,999 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 [2023-12-19 12:55:22,000 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:22,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash 807195724, now seen corresponding path program 1 times [2023-12-19 12:55:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:22,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180603508] [2023-12-19 12:55:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:22,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:22,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737944049] [2023-12-19 12:55:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:22,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:22,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:22,029 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) [2023-12-19 12:55:22,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 12:55:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:22,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 12:55:22,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:22,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:22,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:22,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180603508] [2023-12-19 12:55:22,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:22,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737944049] [2023-12-19 12:55:22,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737944049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:22,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:22,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 12:55:22,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119233300] [2023-12-19 12:55:22,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:22,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 12:55:22,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 12:55:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-19 12:55:22,492 INFO L87 Difference]: Start difference. First operand 4642 states and 7368 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:23,419 INFO L93 Difference]: Finished difference Result 9299 states and 14556 transitions. [2023-12-19 12:55:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 12:55:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 248 [2023-12-19 12:55:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:23,433 INFO L225 Difference]: With dead ends: 9299 [2023-12-19 12:55:23,433 INFO L226 Difference]: Without dead ends: 6505 [2023-12-19 12:55:23,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-12-19 12:55:23,439 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1593 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:23,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 1664 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 12:55:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2023-12-19 12:55:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 4669. [2023-12-19 12:55:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4216 states have (on average 1.564278937381404) internal successors, (6595), 4232 states have internal predecessors, (6595), 409 states have call successors, (409), 43 states have call predecessors, (409), 43 states have return successors, (409), 393 states have call predecessors, (409), 409 states have call successors, (409) [2023-12-19 12:55:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 7413 transitions. [2023-12-19 12:55:23,644 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 7413 transitions. Word has length 248 [2023-12-19 12:55:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:23,644 INFO L495 AbstractCegarLoop]: Abstraction has 4669 states and 7413 transitions. [2023-12-19 12:55:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 7413 transitions. [2023-12-19 12:55:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-12-19 12:55:23,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:23,648 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:23,854 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 [2023-12-19 12:55:23,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:23,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash -734423901, now seen corresponding path program 1 times [2023-12-19 12:55:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:23,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274238069] [2023-12-19 12:55:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:23,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:23,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:23,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804548021] [2023-12-19 12:55:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:23,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:23,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:23,897 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) [2023-12-19 12:55:23,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 12:55:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:24,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 12:55:24,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1114 proven. 66 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-12-19 12:55:24,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:55:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-12-19 12:55:24,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274238069] [2023-12-19 12:55:24,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804548021] [2023-12-19 12:55:24,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804548021] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:55:24,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:55:24,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-19 12:55:24,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578261897] [2023-12-19 12:55:24,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:55:24,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 12:55:24,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 12:55:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-19 12:55:24,793 INFO L87 Difference]: Start difference. First operand 4669 states and 7413 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-12-19 12:55:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:25,968 INFO L93 Difference]: Finished difference Result 13209 states and 20955 transitions. [2023-12-19 12:55:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 12:55:25,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 248 [2023-12-19 12:55:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:26,005 INFO L225 Difference]: With dead ends: 13209 [2023-12-19 12:55:26,006 INFO L226 Difference]: Without dead ends: 9547 [2023-12-19 12:55:26,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-12-19 12:55:26,014 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 981 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:26,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 2086 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 12:55:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9547 states. [2023-12-19 12:55:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 6671. [2023-12-19 12:55:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 5787 states have (on average 1.5540003456022118) internal successors, (8993), 5819 states have internal predecessors, (8993), 783 states have call successors, (783), 100 states have call predecessors, (783), 100 states have return successors, (783), 751 states have call predecessors, (783), 783 states have call successors, (783) [2023-12-19 12:55:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 10559 transitions. [2023-12-19 12:55:26,356 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 10559 transitions. Word has length 248 [2023-12-19 12:55:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:26,356 INFO L495 AbstractCegarLoop]: Abstraction has 6671 states and 10559 transitions. [2023-12-19 12:55:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-12-19 12:55:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 10559 transitions. [2023-12-19 12:55:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-12-19 12:55:26,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:26,359 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:26,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:26,565 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 [2023-12-19 12:55:26,566 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:26,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -827308979, now seen corresponding path program 1 times [2023-12-19 12:55:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898512963] [2023-12-19 12:55:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:26,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:26,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376860547] [2023-12-19 12:55:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:26,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:26,622 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) [2023-12-19 12:55:26,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 12:55:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:26,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 12:55:26,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:27,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898512963] [2023-12-19 12:55:27,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376860547] [2023-12-19 12:55:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376860547] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:27,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 12:55:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554268596] [2023-12-19 12:55:27,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 12:55:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 12:55:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-19 12:55:27,461 INFO L87 Difference]: Start difference. First operand 6671 states and 10559 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:28,219 INFO L93 Difference]: Finished difference Result 16723 states and 26447 transitions. [2023-12-19 12:55:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 12:55:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 249 [2023-12-19 12:55:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:28,234 INFO L225 Difference]: With dead ends: 16723 [2023-12-19 12:55:28,234 INFO L226 Difference]: Without dead ends: 10231 [2023-12-19 12:55:28,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-12-19 12:55:28,244 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 542 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:28,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1493 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 12:55:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10231 states. [2023-12-19 12:55:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10231 to 7094. [2023-12-19 12:55:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 6210 states have (on average 1.55426731078905) internal successors, (9652), 6242 states have internal predecessors, (9652), 783 states have call successors, (783), 100 states have call predecessors, (783), 100 states have return successors, (783), 751 states have call predecessors, (783), 783 states have call successors, (783) [2023-12-19 12:55:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 11218 transitions. [2023-12-19 12:55:28,631 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 11218 transitions. Word has length 249 [2023-12-19 12:55:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:28,631 INFO L495 AbstractCegarLoop]: Abstraction has 7094 states and 11218 transitions. [2023-12-19 12:55:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 11218 transitions. [2023-12-19 12:55:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-12-19 12:55:28,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:28,638 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:28,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:28,846 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 [2023-12-19 12:55:28,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:28,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash 972850219, now seen corresponding path program 1 times [2023-12-19 12:55:28,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:28,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865688209] [2023-12-19 12:55:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:28,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:28,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737974735] [2023-12-19 12:55:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:28,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:28,889 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) [2023-12-19 12:55:28,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 12:55:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:29,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 12:55:29,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:29,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865688209] [2023-12-19 12:55:29,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737974735] [2023-12-19 12:55:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737974735] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:29,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:29,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 12:55:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516677456] [2023-12-19 12:55:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:29,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 12:55:29,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 12:55:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-12-19 12:55:29,755 INFO L87 Difference]: Start difference. First operand 7094 states and 11218 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:31,551 INFO L93 Difference]: Finished difference Result 34371 states and 54774 transitions. [2023-12-19 12:55:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 12:55:31,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 250 [2023-12-19 12:55:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:31,596 INFO L225 Difference]: With dead ends: 34371 [2023-12-19 12:55:31,597 INFO L226 Difference]: Without dead ends: 28867 [2023-12-19 12:55:31,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-12-19 12:55:31,606 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 1153 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:31,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 2362 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 12:55:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2023-12-19 12:55:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 14320. [2023-12-19 12:55:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14320 states, 12559 states have (on average 1.5495660482522493) internal successors, (19461), 12623 states have internal predecessors, (19461), 1531 states have call successors, (1531), 229 states have call predecessors, (1531), 229 states have return successors, (1531), 1467 states have call predecessors, (1531), 1531 states have call successors, (1531) [2023-12-19 12:55:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14320 states to 14320 states and 22523 transitions. [2023-12-19 12:55:32,375 INFO L78 Accepts]: Start accepts. Automaton has 14320 states and 22523 transitions. Word has length 250 [2023-12-19 12:55:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:32,376 INFO L495 AbstractCegarLoop]: Abstraction has 14320 states and 22523 transitions. [2023-12-19 12:55:32,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14320 states and 22523 transitions. [2023-12-19 12:55:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-12-19 12:55:32,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:32,381 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:32,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:32,588 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 [2023-12-19 12:55:32,589 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:32,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1811973481, now seen corresponding path program 1 times [2023-12-19 12:55:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:32,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148563329] [2023-12-19 12:55:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:32,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:32,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:32,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712244811] [2023-12-19 12:55:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:32,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:32,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:32,646 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) [2023-12-19 12:55:32,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 12:55:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:32,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 12:55:32,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1182 proven. 60 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2023-12-19 12:55:33,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:55:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 42 proven. 60 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-12-19 12:55:34,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148563329] [2023-12-19 12:55:34,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712244811] [2023-12-19 12:55:34,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712244811] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:55:34,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:55:34,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-12-19 12:55:34,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008379410] [2023-12-19 12:55:34,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:55:34,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 12:55:34,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 12:55:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-12-19 12:55:34,407 INFO L87 Difference]: Start difference. First operand 14320 states and 22523 transitions. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-12-19 12:55:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:38,041 INFO L93 Difference]: Finished difference Result 42254 states and 66351 transitions. [2023-12-19 12:55:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 12:55:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) Word has length 250 [2023-12-19 12:55:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:38,116 INFO L225 Difference]: With dead ends: 42254 [2023-12-19 12:55:38,116 INFO L226 Difference]: Without dead ends: 28684 [2023-12-19 12:55:38,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=1374, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 12:55:38,138 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1198 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:38,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 2100 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-19 12:55:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28684 states. [2023-12-19 12:55:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28684 to 16189. [2023-12-19 12:55:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16189 states, 14426 states have (on average 1.555871343407736) internal successors, (22445), 14490 states have internal predecessors, (22445), 1531 states have call successors, (1531), 231 states have call predecessors, (1531), 231 states have return successors, (1531), 1467 states have call predecessors, (1531), 1531 states have call successors, (1531) [2023-12-19 12:55:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16189 states to 16189 states and 25507 transitions. [2023-12-19 12:55:39,318 INFO L78 Accepts]: Start accepts. Automaton has 16189 states and 25507 transitions. Word has length 250 [2023-12-19 12:55:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:39,318 INFO L495 AbstractCegarLoop]: Abstraction has 16189 states and 25507 transitions. [2023-12-19 12:55:39,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70) [2023-12-19 12:55:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 16189 states and 25507 transitions. [2023-12-19 12:55:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-12-19 12:55:39,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:39,325 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:39,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-19 12:55:39,530 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 [2023-12-19 12:55:39,531 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:39,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 694234863, now seen corresponding path program 1 times [2023-12-19 12:55:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761511626] [2023-12-19 12:55:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:39,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:39,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165182070] [2023-12-19 12:55:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:39,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:39,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:39,557 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) [2023-12-19 12:55:39,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 12:55:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:39,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 12:55:39,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:55:40,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:55:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761511626] [2023-12-19 12:55:40,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165182070] [2023-12-19 12:55:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165182070] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:55:40,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:55:40,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 12:55:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891616038] [2023-12-19 12:55:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:55:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 12:55:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 12:55:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-19 12:55:40,340 INFO L87 Difference]: Start difference. First operand 16189 states and 25507 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:55:41,708 INFO L93 Difference]: Finished difference Result 30734 states and 48405 transitions. [2023-12-19 12:55:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 12:55:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 250 [2023-12-19 12:55:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:55:41,739 INFO L225 Difference]: With dead ends: 30734 [2023-12-19 12:55:41,739 INFO L226 Difference]: Without dead ends: 24048 [2023-12-19 12:55:41,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-19 12:55:41,753 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 557 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 12:55:41,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1376 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 12:55:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24048 states. [2023-12-19 12:55:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24048 to 16859. [2023-12-19 12:55:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16859 states, 15096 states have (on average 1.5561075781664018) internal successors, (23491), 15160 states have internal predecessors, (23491), 1531 states have call successors, (1531), 231 states have call predecessors, (1531), 231 states have return successors, (1531), 1467 states have call predecessors, (1531), 1531 states have call successors, (1531) [2023-12-19 12:55:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16859 states to 16859 states and 26553 transitions. [2023-12-19 12:55:42,695 INFO L78 Accepts]: Start accepts. Automaton has 16859 states and 26553 transitions. Word has length 250 [2023-12-19 12:55:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:55:42,695 INFO L495 AbstractCegarLoop]: Abstraction has 16859 states and 26553 transitions. [2023-12-19 12:55:42,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:55:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16859 states and 26553 transitions. [2023-12-19 12:55:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-12-19 12:55:42,702 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:55:42,702 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:55:42,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 12:55:42,908 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 [2023-12-19 12:55:42,908 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:55:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:55:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1578945070, now seen corresponding path program 1 times [2023-12-19 12:55:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:55:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754290843] [2023-12-19 12:55:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:55:42,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:55:42,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661525530] [2023-12-19 12:55:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:55:42,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:55:42,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:55:42,936 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:55:42,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 12:55:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:55:43,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 12:55:43,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:55:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1204 proven. 114 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-12-19 12:55:43,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:55:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 84 proven. 117 refuted. 0 times theorem prover too weak. 2179 trivial. 0 not checked. [2023-12-19 12:55:44,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:55:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754290843] [2023-12-19 12:55:44,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:55:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661525530] [2023-12-19 12:55:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661525530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:55:44,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:55:44,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2023-12-19 12:55:44,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334555110] [2023-12-19 12:55:44,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:55:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 12:55:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:55:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 12:55:44,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-12-19 12:55:44,666 INFO L87 Difference]: Start difference. First operand 16859 states and 26553 transitions. Second operand has 21 states, 20 states have (on average 7.55) internal successors, (151), 19 states have internal predecessors, (151), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) [2023-12-19 12:56:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:56:00,313 INFO L93 Difference]: Finished difference Result 183102 states and 286066 transitions. [2023-12-19 12:56:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-19 12:56:00,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 7.55) internal successors, (151), 19 states have internal predecessors, (151), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) Word has length 250 [2023-12-19 12:56:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:56:00,682 INFO L225 Difference]: With dead ends: 183102 [2023-12-19 12:56:00,682 INFO L226 Difference]: Without dead ends: 168262 [2023-12-19 12:56:00,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4101 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2725, Invalid=6977, Unknown=0, NotChecked=0, Total=9702 [2023-12-19 12:56:00,727 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 3884 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 1030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3913 SdHoareTripleChecker+Valid, 2951 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-19 12:56:00,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3913 Valid, 2951 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1030 Valid, 2862 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-19 12:56:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168262 states. [2023-12-19 12:56:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168262 to 120046. [2023-12-19 12:56:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120046 states, 114355 states have (on average 1.5905819596869397) internal successors, (181891), 114639 states have internal predecessors, (181891), 4911 states have call successors, (4911), 779 states have call predecessors, (4911), 779 states have return successors, (4911), 4627 states have call predecessors, (4911), 4911 states have call successors, (4911) [2023-12-19 12:56:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120046 states to 120046 states and 191713 transitions. [2023-12-19 12:56:06,520 INFO L78 Accepts]: Start accepts. Automaton has 120046 states and 191713 transitions. Word has length 250 [2023-12-19 12:56:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:56:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 120046 states and 191713 transitions. [2023-12-19 12:56:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 7.55) internal successors, (151), 19 states have internal predecessors, (151), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) [2023-12-19 12:56:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 120046 states and 191713 transitions. [2023-12-19 12:56:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-19 12:56:06,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:56:06,544 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:56:06,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 12:56:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 12:56:06,751 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:56:06,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:56:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 221909367, now seen corresponding path program 1 times [2023-12-19 12:56:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:56:06,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661398137] [2023-12-19 12:56:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:56:06,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:56:06,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:56:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498761187] [2023-12-19 12:56:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:56:06,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:56:06,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:56:06,776 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:56:06,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 12:56:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:56:07,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 12:56:07,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:56:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:56:07,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:56:07,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:56:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661398137] [2023-12-19 12:56:07,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:56:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498761187] [2023-12-19 12:56:07,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498761187] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:56:07,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:56:07,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-19 12:56:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205587824] [2023-12-19 12:56:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:56:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 12:56:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:56:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 12:56:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-12-19 12:56:07,618 INFO L87 Difference]: Start difference. First operand 120046 states and 191713 transitions. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 12 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:56:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:56:15,012 INFO L93 Difference]: Finished difference Result 259418 states and 416209 transitions. [2023-12-19 12:56:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 12:56:15,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 12 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 251 [2023-12-19 12:56:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:56:15,382 INFO L225 Difference]: With dead ends: 259418 [2023-12-19 12:56:15,383 INFO L226 Difference]: Without dead ends: 219988 [2023-12-19 12:56:15,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2023-12-19 12:56:15,449 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 1200 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 12:56:15,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 2395 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 12:56:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219988 states. [2023-12-19 12:56:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219988 to 129498. [2023-12-19 12:56:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129498 states, 122565 states have (on average 1.585664749316689) internal successors, (194347), 122899 states have internal predecessors, (194347), 5911 states have call successors, (5911), 1021 states have call predecessors, (5911), 1021 states have return successors, (5911), 5577 states have call predecessors, (5911), 5911 states have call successors, (5911) [2023-12-19 12:56:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129498 states to 129498 states and 206169 transitions. [2023-12-19 12:56:22,006 INFO L78 Accepts]: Start accepts. Automaton has 129498 states and 206169 transitions. Word has length 251 [2023-12-19 12:56:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:56:22,007 INFO L495 AbstractCegarLoop]: Abstraction has 129498 states and 206169 transitions. [2023-12-19 12:56:22,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 12 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:56:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 129498 states and 206169 transitions. [2023-12-19 12:56:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-19 12:56:22,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:56:22,033 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:56:22,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 12:56:22,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:56:22,240 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:56:22,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:56:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1061032629, now seen corresponding path program 1 times [2023-12-19 12:56:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:56:22,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287051196] [2023-12-19 12:56:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:56:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:56:22,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:56:22,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910513413] [2023-12-19 12:56:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:56:22,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:56:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:56:22,281 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:56:22,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 12:56:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:56:22,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-19 12:56:22,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:56:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1204 proven. 114 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2023-12-19 12:56:23,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:56:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 84 proven. 117 refuted. 0 times theorem prover too weak. 2179 trivial. 0 not checked. [2023-12-19 12:56:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:56:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287051196] [2023-12-19 12:56:25,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:56:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910513413] [2023-12-19 12:56:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910513413] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:56:25,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:56:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-12-19 12:56:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581132037] [2023-12-19 12:56:25,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:56:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 12:56:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:56:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 12:56:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-12-19 12:56:25,649 INFO L87 Difference]: Start difference. First operand 129498 states and 206169 transitions. Second operand has 30 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) [2023-12-19 12:56:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:56:42,488 INFO L93 Difference]: Finished difference Result 379170 states and 604261 transitions. [2023-12-19 12:56:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-19 12:56:42,489 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) Word has length 251 [2023-12-19 12:56:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:56:43,055 INFO L225 Difference]: With dead ends: 379170 [2023-12-19 12:56:43,056 INFO L226 Difference]: Without dead ends: 303478 [2023-12-19 12:56:43,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1859, Invalid=5623, Unknown=0, NotChecked=0, Total=7482 [2023-12-19 12:56:43,122 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 3471 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3472 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-19 12:56:43,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3472 Valid, 2960 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-19 12:56:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303478 states. [2023-12-19 12:56:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303478 to 142173. [2023-12-19 12:56:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142173 states, 135240 states have (on average 1.5909568175096125) internal successors, (215161), 135574 states have internal predecessors, (215161), 5911 states have call successors, (5911), 1021 states have call predecessors, (5911), 1021 states have return successors, (5911), 5577 states have call predecessors, (5911), 5911 states have call successors, (5911) [2023-12-19 12:56:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142173 states to 142173 states and 226983 transitions. [2023-12-19 12:56:51,042 INFO L78 Accepts]: Start accepts. Automaton has 142173 states and 226983 transitions. Word has length 251 [2023-12-19 12:56:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:56:51,042 INFO L495 AbstractCegarLoop]: Abstraction has 142173 states and 226983 transitions. [2023-12-19 12:56:51,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.413793103448276) internal successors, (157), 28 states have internal predecessors, (157), 6 states have call successors, (70), 4 states have call predecessors, (70), 7 states have return successors, (70), 6 states have call predecessors, (70), 6 states have call successors, (70) [2023-12-19 12:56:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 142173 states and 226983 transitions. [2023-12-19 12:56:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-19 12:56:51,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:56:51,066 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:56:51,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 12:56:51,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:56:51,273 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:56:51,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:56:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1193658639, now seen corresponding path program 1 times [2023-12-19 12:56:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:56:51,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745757323] [2023-12-19 12:56:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:56:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:56:51,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:56:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331333651] [2023-12-19 12:56:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:56:51,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:56:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:56:51,318 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:56:51,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 12:56:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:56:51,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-19 12:56:51,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:56:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1192 proven. 228 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-12-19 12:56:52,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:56:53,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:56:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745757323] [2023-12-19 12:56:53,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:56:53,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331333651] [2023-12-19 12:56:53,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331333651] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 12:56:53,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 12:56:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-19 12:56:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431943543] [2023-12-19 12:56:53,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 12:56:53,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 12:56:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:56:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 12:56:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-12-19 12:56:53,857 INFO L87 Difference]: Start difference. First operand 142173 states and 226983 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 16 states have internal predecessors, (94), 5 states have call successors, (35), 5 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2023-12-19 12:57:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:57:08,283 INFO L93 Difference]: Finished difference Result 301010 states and 478424 transitions. [2023-12-19 12:57:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-19 12:57:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 16 states have internal predecessors, (94), 5 states have call successors, (35), 5 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) Word has length 251 [2023-12-19 12:57:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:57:08,808 INFO L225 Difference]: With dead ends: 301010 [2023-12-19 12:57:08,809 INFO L226 Difference]: Without dead ends: 227936 [2023-12-19 12:57:08,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1920, Invalid=7586, Unknown=0, NotChecked=0, Total=9506 [2023-12-19 12:57:08,882 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 2017 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2032 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 12:57:08,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2032 Valid, 1725 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 12:57:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227936 states. [2023-12-19 12:57:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227936 to 186134. [2023-12-19 12:57:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186134 states, 177830 states have (on average 1.5846538829218917) internal successors, (281799), 178230 states have internal predecessors, (281799), 6999 states have call successors, (6999), 1304 states have call predecessors, (6999), 1304 states have return successors, (6999), 6599 states have call predecessors, (6999), 6999 states have call successors, (6999) [2023-12-19 12:57:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186134 states to 186134 states and 295797 transitions. [2023-12-19 12:57:18,499 INFO L78 Accepts]: Start accepts. Automaton has 186134 states and 295797 transitions. Word has length 251 [2023-12-19 12:57:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:57:18,499 INFO L495 AbstractCegarLoop]: Abstraction has 186134 states and 295797 transitions. [2023-12-19 12:57:18,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 16 states have internal predecessors, (94), 5 states have call successors, (35), 5 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2023-12-19 12:57:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 186134 states and 295797 transitions. [2023-12-19 12:57:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-19 12:57:18,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:57:18,536 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:57:18,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-19 12:57:18,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:57:18,744 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:57:18,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:57:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1780464653, now seen corresponding path program 1 times [2023-12-19 12:57:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:57:18,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185727771] [2023-12-19 12:57:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:57:18,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:57:18,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:57:18,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001692226] [2023-12-19 12:57:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:57:18,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:57:18,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:57:18,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:57:18,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 12:57:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:57:19,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 12:57:19,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:57:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-12-19 12:57:19,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 12:57:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:57:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185727771] [2023-12-19 12:57:19,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:57:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001692226] [2023-12-19 12:57:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001692226] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 12:57:19,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 12:57:19,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 12:57:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143715803] [2023-12-19 12:57:19,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 12:57:19,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 12:57:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:57:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 12:57:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 12:57:19,305 INFO L87 Difference]: Start difference. First operand 186134 states and 295797 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:57:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 12:57:33,880 INFO L93 Difference]: Finished difference Result 516088 states and 821387 transitions. [2023-12-19 12:57:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 12:57:33,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) Word has length 251 [2023-12-19 12:57:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 12:57:34,603 INFO L225 Difference]: With dead ends: 516088 [2023-12-19 12:57:34,604 INFO L226 Difference]: Without dead ends: 352192 [2023-12-19 12:57:34,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 12:57:34,748 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 97 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 12:57:34,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 481 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 12:57:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352192 states. [2023-12-19 12:57:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352192 to 340970. [2023-12-19 12:57:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340970 states, 324407 states have (on average 1.5784153856112846) internal successors, (512049), 325207 states have internal predecessors, (512049), 13963 states have call successors, (13963), 2599 states have call predecessors, (13963), 2599 states have return successors, (13963), 13163 states have call predecessors, (13963), 13963 states have call successors, (13963) [2023-12-19 12:57:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340970 states to 340970 states and 539975 transitions. [2023-12-19 12:57:52,960 INFO L78 Accepts]: Start accepts. Automaton has 340970 states and 539975 transitions. Word has length 251 [2023-12-19 12:57:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 12:57:52,960 INFO L495 AbstractCegarLoop]: Abstraction has 340970 states and 539975 transitions. [2023-12-19 12:57:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 1 states have call successors, (35), 1 states have call predecessors, (35), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35) [2023-12-19 12:57:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 340970 states and 539975 transitions. [2023-12-19 12:57:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-19 12:57:53,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 12:57:53,002 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 12:57:53,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 12:57:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:57:53,213 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 12:57:53,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 12:57:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -941341391, now seen corresponding path program 1 times [2023-12-19 12:57:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 12:57:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599284858] [2023-12-19 12:57:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:57:53,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 12:57:53,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 12:57:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713996421] [2023-12-19 12:57:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 12:57:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 12:57:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 12:57:53,266 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 12:57:53,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 12:57:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 12:57:53,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 12:57:53,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 12:57:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1114 proven. 66 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-12-19 12:57:54,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 12:57:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2023-12-19 12:57:56,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 12:57:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599284858] [2023-12-19 12:57:56,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 12:57:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713996421] [2023-12-19 12:57:56,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713996421] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 12:57:56,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 12:57:56,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-19 12:57:56,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112875117] [2023-12-19 12:57:56,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 12:57:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 12:57:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 12:57:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 12:57:56,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-12-19 12:57:56,021 INFO L87 Difference]: Start difference. First operand 340970 states and 539975 transitions. Second operand has 13 states, 13 states have (on average 9.923076923076923) internal successors, (129), 13 states have internal predecessors, (129), 4 states have call successors, (70), 3 states have call predecessors, (70), 5 states have return successors, (70), 4 states have call predecessors, (70), 4 states have call successors, (70)