/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/pcomp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 10:34:49,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 10:34:50,042 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 10:34:50,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 10:34:50,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 10:34:50,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 10:34:50,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 10:34:50,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 10:34:50,068 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 10:34:50,071 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 10:34:50,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 10:34:50,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 10:34:50,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 10:34:50,073 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 10:34:50,073 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 10:34:50,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 10:34:50,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 10:34:50,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 10:34:50,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 10:34:50,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 10:34:50,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 10:34:50,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 10:34:50,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 10:34:50,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 10:34:50,075 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 10:34:50,075 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 10:34:50,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 10:34:50,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 10:34:50,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 10:34:50,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 10:34:50,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:34:50,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 10:34:50,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 10:34:50,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 10:34:50,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 10:34:50,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 10:34:50,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 10:34:50,078 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 10:34:50,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 10:34:50,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 10:34:50,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 10:34:50,290 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 10:34:50,290 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 10:34:50,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/pcomp.c [2023-12-20 10:34:51,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 10:34:51,545 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 10:34:51,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/pcomp.c [2023-12-20 10:34:51,551 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e969775/9d7515bc668743e6bfdfe740eda4d417/FLAG01aec76ae [2023-12-20 10:34:51,565 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e969775/9d7515bc668743e6bfdfe740eda4d417 [2023-12-20 10:34:51,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 10:34:51,568 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 10:34:51,568 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 10:34:51,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 10:34:51,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 10:34:51,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b6f197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51, skipping insertion in model container [2023-12-20 10:34:51,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,587 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 10:34:51,708 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/pcomp.c[588,601] [2023-12-20 10:34:51,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:34:51,730 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 10:34:51,738 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/pcomp.c[588,601] [2023-12-20 10:34:51,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:34:51,757 INFO L206 MainTranslator]: Completed translation [2023-12-20 10:34:51,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51 WrapperNode [2023-12-20 10:34:51,758 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 10:34:51,759 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 10:34:51,759 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 10:34:51,759 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 10:34:51,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,786 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,804 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 97 [2023-12-20 10:34:51,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 10:34:51,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 10:34:51,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 10:34:51,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 10:34:51,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,813 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,822 INFO L175 MemorySlicer]: Split 22 memory accesses to 5 slices as follows [2, 8, 4, 4, 4]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 6 writes are split as follows [0, 0, 2, 2, 2]. [2023-12-20 10:34:51,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,829 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 10:34:51,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 10:34:51,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 10:34:51,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 10:34:51,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (1/1) ... [2023-12-20 10:34:51,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:34:51,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:51,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 10:34:51,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 10:34:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 10:34:51,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 10:34:51,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-20 10:34:51,936 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 10:34:51,938 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 10:34:52,051 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 10:34:52,103 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 10:34:52,103 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-20 10:34:52,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:34:52 BoogieIcfgContainer [2023-12-20 10:34:52,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 10:34:52,105 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 10:34:52,105 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 10:34:52,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 10:34:52,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 10:34:51" (1/3) ... [2023-12-20 10:34:52,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640164bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:34:52, skipping insertion in model container [2023-12-20 10:34:52,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:34:51" (2/3) ... [2023-12-20 10:34:52,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640164bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:34:52, skipping insertion in model container [2023-12-20 10:34:52,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:34:52" (3/3) ... [2023-12-20 10:34:52,114 INFO L112 eAbstractionObserver]: Analyzing ICFG pcomp.c [2023-12-20 10:34:52,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 10:34:52,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 10:34:52,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 10:34:52,167 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;@bb2c5cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 10:34:52,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 10:34:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 10:34:52,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:52,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:52,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:52,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1188727277, now seen corresponding path program 1 times [2023-12-20 10:34:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:52,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923284342] [2023-12-20 10:34:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:52,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:52,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923284342] [2023-12-20 10:34:52,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 10:34:52,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654872566] [2023-12-20 10:34:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:52,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:52,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:52,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:52,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 10:34:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:52,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 10:34:52,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:34:52,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:34:52,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654872566] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:34:52,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:34:52,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 10:34:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016372518] [2023-12-20 10:34:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:34:52,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 10:34:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 10:34:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:34:52,495 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:52,530 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2023-12-20 10:34:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 10:34:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 10:34:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:52,538 INFO L225 Difference]: With dead ends: 33 [2023-12-20 10:34:52,538 INFO L226 Difference]: Without dead ends: 15 [2023-12-20 10:34:52,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:34:52,542 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:52,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:34:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-20 10:34:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-20 10:34:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-20 10:34:52,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 13 [2023-12-20 10:34:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:52,564 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-20 10:34:52,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-20 10:34:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 10:34:52,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:52,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:52,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 10:34:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-20 10:34:52,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash -487662699, now seen corresponding path program 1 times [2023-12-20 10:34:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:52,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416362081] [2023-12-20 10:34:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:52,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:52,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784768739] [2023-12-20 10:34:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:52,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:52,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:52,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 10:34:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:52,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 10:34:52,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:52,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:34:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:34:53,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:34:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416362081] [2023-12-20 10:34:53,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784768739] [2023-12-20 10:34:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784768739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:34:53,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:34:53,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 10:34:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614181827] [2023-12-20 10:34:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:34:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 10:34:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 10:34:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 10:34:53,013 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:53,081 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-12-20 10:34:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 10:34:53,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 10:34:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:53,082 INFO L225 Difference]: With dead ends: 27 [2023-12-20 10:34:53,082 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 10:34:53,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 10:34:53,083 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:53,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:34:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 10:34:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-12-20 10:34:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-20 10:34:53,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2023-12-20 10:34:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:53,090 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-20 10:34:53,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-20 10:34:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 10:34:53,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:53,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:53,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-20 10:34:53,293 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 [2023-12-20 10:34:53,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:53,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1095105113, now seen corresponding path program 1 times [2023-12-20 10:34:53,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:53,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314531474] [2023-12-20 10:34:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:53,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:53,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517016583] [2023-12-20 10:34:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:53,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:53,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 10:34:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:53,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 10:34:53,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:34:53,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:34:53,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:53,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314531474] [2023-12-20 10:34:53,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:53,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517016583] [2023-12-20 10:34:53,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517016583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:34:53,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:34:53,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 10:34:53,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540640595] [2023-12-20 10:34:53,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:34:53,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 10:34:53,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 10:34:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 10:34:53,444 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:53,509 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2023-12-20 10:34:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 10:34:53,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-20 10:34:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:53,510 INFO L225 Difference]: With dead ends: 50 [2023-12-20 10:34:53,510 INFO L226 Difference]: Without dead ends: 37 [2023-12-20 10:34:53,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-20 10:34:53,511 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:53,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:34:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-20 10:34:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2023-12-20 10:34:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-12-20 10:34:53,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 14 [2023-12-20 10:34:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:53,515 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-12-20 10:34:53,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-12-20 10:34:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 10:34:53,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:53,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:53,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 10:34:53,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:53,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:53,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1920173534, now seen corresponding path program 1 times [2023-12-20 10:34:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731272848] [2023-12-20 10:34:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:53,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:53,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046134800] [2023-12-20 10:34:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:53,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:53,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:53,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 10:34:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:53,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 10:34:53,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:34:53,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:34:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:53,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731272848] [2023-12-20 10:34:53,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:53,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046134800] [2023-12-20 10:34:53,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046134800] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:34:53,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:34:53,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 10:34:53,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451652387] [2023-12-20 10:34:53,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:34:53,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 10:34:53,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:53,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 10:34:53,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 10:34:53,874 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:53,941 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-12-20 10:34:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 10:34:53,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-20 10:34:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:53,943 INFO L225 Difference]: With dead ends: 39 [2023-12-20 10:34:53,943 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 10:34:53,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-20 10:34:53,947 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:53,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:34:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 10:34:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-12-20 10:34:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-20 10:34:53,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 16 [2023-12-20 10:34:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:53,956 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-20 10:34:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-20 10:34:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 10:34:53,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:53,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:53,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-20 10:34:54,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:54,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:54,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1565422374, now seen corresponding path program 1 times [2023-12-20 10:34:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:54,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789871013] [2023-12-20 10:34:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:54,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:54,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065793404] [2023-12-20 10:34:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:54,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:54,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:54,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:54,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 10:34:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:54,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-20 10:34:54,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:54,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:34:54,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-12-20 10:34:54,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:34:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:34:54,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:34:54,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:34:54,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 163 [2023-12-20 10:34:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:34:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:54,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789871013] [2023-12-20 10:34:54,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:54,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065793404] [2023-12-20 10:34:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065793404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:34:54,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:34:54,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2023-12-20 10:34:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970599268] [2023-12-20 10:34:54,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:34:54,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 10:34:54,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 10:34:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-20 10:34:54,534 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:54,704 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2023-12-20 10:34:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 10:34:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-20 10:34:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:54,705 INFO L225 Difference]: With dead ends: 46 [2023-12-20 10:34:54,705 INFO L226 Difference]: Without dead ends: 44 [2023-12-20 10:34:54,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:34:54,705 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:54,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:34:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-20 10:34:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 23. [2023-12-20 10:34:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-20 10:34:54,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2023-12-20 10:34:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:54,710 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-20 10:34:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-20 10:34:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 10:34:54,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:54,710 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:54,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-20 10:34:54,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:54,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:54,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash 909087194, now seen corresponding path program 2 times [2023-12-20 10:34:54,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:54,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528829822] [2023-12-20 10:34:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:54,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:54,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585248624] [2023-12-20 10:34:54,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:34:54,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:54,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:54,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 10:34:55,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:34:55,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:34:55,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:34:55,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:34:55,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:34:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:34:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528829822] [2023-12-20 10:34:55,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585248624] [2023-12-20 10:34:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585248624] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:34:55,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:34:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-20 10:34:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690751815] [2023-12-20 10:34:55,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:34:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 10:34:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 10:34:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-20 10:34:55,104 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:55,221 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-12-20 10:34:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:34:55,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-20 10:34:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:55,222 INFO L225 Difference]: With dead ends: 66 [2023-12-20 10:34:55,222 INFO L226 Difference]: Without dead ends: 51 [2023-12-20 10:34:55,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:34:55,223 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:55,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:34:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-20 10:34:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2023-12-20 10:34:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-12-20 10:34:55,238 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2023-12-20 10:34:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:55,238 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-12-20 10:34:55,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-12-20 10:34:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:34:55,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:55,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:55,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-20 10:34:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:55,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:55,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:55,445 INFO L85 PathProgramCache]: Analyzing trace with hash -737766791, now seen corresponding path program 1 times [2023-12-20 10:34:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26316009] [2023-12-20 10:34:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:55,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797437318] [2023-12-20 10:34:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:55,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:55,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:55,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 10:34:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:34:55,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-20 10:34:55,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:55,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:34:55,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:34:55,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-12-20 10:34:55,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 10:34:55,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:34:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:34:55,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:34:56,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:34:56,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 163 [2023-12-20 10:34:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:34:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:56,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26316009] [2023-12-20 10:34:56,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:56,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797437318] [2023-12-20 10:34:56,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797437318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:34:56,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:34:56,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2023-12-20 10:34:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467764893] [2023-12-20 10:34:56,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:34:56,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 10:34:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 10:34:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-12-20 10:34:56,253 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:58,034 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-12-20 10:34:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 10:34:58,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-20 10:34:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:58,035 INFO L225 Difference]: With dead ends: 71 [2023-12-20 10:34:58,035 INFO L226 Difference]: Without dead ends: 69 [2023-12-20 10:34:58,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 10:34:58,036 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:58,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 119 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 10:34:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-20 10:34:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 44. [2023-12-20 10:34:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-12-20 10:34:58,043 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2023-12-20 10:34:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:58,043 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-12-20 10:34:58,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-12-20 10:34:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 10:34:58,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:58,044 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:58,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 10:34:58,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:58,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:58,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:58,250 INFO L85 PathProgramCache]: Analyzing trace with hash -366283705, now seen corresponding path program 3 times [2023-12-20 10:34:58,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:58,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257691021] [2023-12-20 10:34:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:58,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:58,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274498694] [2023-12-20 10:34:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:34:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:58,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:58,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 10:34:58,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 10:34:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:34:58,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:34:58,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:34:58,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:34:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:34:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:34:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257691021] [2023-12-20 10:34:58,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:34:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274498694] [2023-12-20 10:34:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274498694] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:34:58,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:34:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-20 10:34:58,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8707830] [2023-12-20 10:34:58,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:34:58,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 10:34:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:34:58,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 10:34:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:34:58,699 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:34:58,888 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2023-12-20 10:34:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:34:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 10:34:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:34:58,889 INFO L225 Difference]: With dead ends: 107 [2023-12-20 10:34:58,889 INFO L226 Difference]: Without dead ends: 72 [2023-12-20 10:34:58,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-12-20 10:34:58,890 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:34:58,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 59 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:34:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-20 10:34:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2023-12-20 10:34:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-12-20 10:34:58,897 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 20 [2023-12-20 10:34:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:34:58,897 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-12-20 10:34:58,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:34:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-12-20 10:34:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 10:34:58,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:34:58,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:34:58,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 10:34:59,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-20 10:34:59,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:34:59,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:34:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1533257222, now seen corresponding path program 4 times [2023-12-20 10:34:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:34:59,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420858769] [2023-12-20 10:34:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:34:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:34:59,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:34:59,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370341094] [2023-12-20 10:34:59,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:34:59,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:34:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:34:59,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:34:59,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 10:34:59,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:34:59,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:34:59,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-20 10:34:59,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:34:59,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:34:59,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-20 10:34:59,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:34:59,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2023-12-20 10:34:59,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:34:59,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 54 [2023-12-20 10:34:59,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:34:59,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 35 [2023-12-20 10:34:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 10:34:59,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:35:00,173 INFO L349 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2023-12-20 10:35:00,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 392 treesize of output 283 [2023-12-20 10:35:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:35:00,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:35:00,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420858769] [2023-12-20 10:35:00,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:35:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370341094] [2023-12-20 10:35:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370341094] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:35:00,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:35:00,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-12-20 10:35:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837191225] [2023-12-20 10:35:00,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:35:00,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 10:35:00,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:35:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 10:35:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-12-20 10:35:00,543 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:35:01,599 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2023-12-20 10:35:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:35:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-20 10:35:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:35:01,600 INFO L225 Difference]: With dead ends: 89 [2023-12-20 10:35:01,600 INFO L226 Difference]: Without dead ends: 87 [2023-12-20 10:35:01,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2023-12-20 10:35:01,601 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 10:35:01,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 95 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 10:35:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-20 10:35:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2023-12-20 10:35:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-12-20 10:35:01,614 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 22 [2023-12-20 10:35:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:35:01,614 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-12-20 10:35:01,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-12-20 10:35:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-20 10:35:01,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:35:01,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:35:01,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 10:35:01,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:35:01,821 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:35:01,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:35:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash 858967641, now seen corresponding path program 2 times [2023-12-20 10:35:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:35:01,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668878362] [2023-12-20 10:35:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:35:01,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:35:01,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:35:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22131491] [2023-12-20 10:35:01,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:35:01,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:35:01,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:35:01,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:35:01,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 10:35:01,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:35:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:35:01,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 10:35:01,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:35:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 10:35:01,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:35:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-20 10:35:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:35:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668878362] [2023-12-20 10:35:01,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:35:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22131491] [2023-12-20 10:35:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22131491] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:35:01,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:35:01,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-12-20 10:35:01,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445842893] [2023-12-20 10:35:01,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:35:01,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 10:35:01,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:35:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 10:35:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:35:01,977 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:35:02,187 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-12-20 10:35:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 10:35:02,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-20 10:35:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:35:02,188 INFO L225 Difference]: With dead ends: 89 [2023-12-20 10:35:02,188 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 10:35:02,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2023-12-20 10:35:02,189 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:35:02,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 66 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:35:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 10:35:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2023-12-20 10:35:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-12-20 10:35:02,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2023-12-20 10:35:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:35:02,197 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-12-20 10:35:02,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-12-20 10:35:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 10:35:02,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:35:02,198 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:35:02,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 10:35:02,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 10:35:02,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:35:02,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:35:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2127757397, now seen corresponding path program 3 times [2023-12-20 10:35:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:35:02,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453555536] [2023-12-20 10:35:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:35:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:35:02,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:35:02,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319291172] [2023-12-20 10:35:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:35:02,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:35:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:35:02,420 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:35:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 10:35:02,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 10:35:02,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:35:02,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-20 10:35:02,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:35:02,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:35:02,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:35:02,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:35:02,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:35:02,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:02,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:35:02,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:35:02,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:02,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:35:02,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:35:02,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:02,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:35:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:35:03,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:35:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:35:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:35:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453555536] [2023-12-20 10:35:05,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:35:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319291172] [2023-12-20 10:35:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319291172] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:35:05,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:35:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-12-20 10:35:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847816363] [2023-12-20 10:35:05,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:35:05,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 10:35:05,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:35:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 10:35:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2023-12-20 10:35:05,028 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:35:09,889 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2023-12-20 10:35:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-20 10:35:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-20 10:35:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:35:09,889 INFO L225 Difference]: With dead ends: 95 [2023-12-20 10:35:09,890 INFO L226 Difference]: Without dead ends: 93 [2023-12-20 10:35:09,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 10:35:09,891 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 10:35:09,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 127 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 10:35:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-20 10:35:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2023-12-20 10:35:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2023-12-20 10:35:09,929 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 25 [2023-12-20 10:35:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:35:09,929 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2023-12-20 10:35:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2023-12-20 10:35:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 10:35:09,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:35:09,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:35:09,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 10:35:10,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 10:35:10,140 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:35:10,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:35:10,140 INFO L85 PathProgramCache]: Analyzing trace with hash -283430567, now seen corresponding path program 4 times [2023-12-20 10:35:10,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:35:10,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220250292] [2023-12-20 10:35:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:35:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:35:10,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:35:10,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077612558] [2023-12-20 10:35:10,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:35:10,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:35:10,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:35:10,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:35:10,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 10:35:10,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:35:10,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:35:10,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-20 10:35:10,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:35:10,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:35:10,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:35:10,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-12-20 10:35:10,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:10,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2023-12-20 10:35:10,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:10,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2023-12-20 10:35:10,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 10:35:10,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:35:10,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:10,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-12-20 10:35:11,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:11,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 30 [2023-12-20 10:35:11,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:35:11,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 10:35:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:35:11,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:35:12,466 INFO L349 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2023-12-20 10:35:12,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 295 [2023-12-20 10:35:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:35:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:35:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220250292] [2023-12-20 10:35:13,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:35:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077612558] [2023-12-20 10:35:13,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077612558] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:35:13,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:35:13,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-12-20 10:35:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040086696] [2023-12-20 10:35:13,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:35:13,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 10:35:13,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:35:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 10:35:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-12-20 10:35:13,323 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:35:18,624 INFO L93 Difference]: Finished difference Result 133 states and 158 transitions. [2023-12-20 10:35:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 10:35:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-20 10:35:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:35:18,625 INFO L225 Difference]: With dead ends: 133 [2023-12-20 10:35:18,625 INFO L226 Difference]: Without dead ends: 131 [2023-12-20 10:35:18,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 10:35:18,626 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:35:18,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 155 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-20 10:35:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-20 10:35:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 77. [2023-12-20 10:35:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 76 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2023-12-20 10:35:18,646 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 25 [2023-12-20 10:35:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:35:18,647 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2023-12-20 10:35:18,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:35:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2023-12-20 10:35:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:35:18,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:35:18,647 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:35:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 10:35:18,854 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 [2023-12-20 10:35:18,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:35:18,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:35:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash 700421114, now seen corresponding path program 5 times [2023-12-20 10:35:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:35:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349474266] [2023-12-20 10:35:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:35:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:35:18,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:35:18,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438190808] [2023-12-20 10:35:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:35:18,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:35:18,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:35:18,890 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:35:18,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 10:49:37,424 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 10:49:37,454 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 10:49:38,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:38,625 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process [2023-12-20 10:49:38,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-20 10:49:38,649 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 10:49:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 10:49:38,649 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 27 with TraceHistMax 7,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-20 10:49:38,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 137 [2023-12-20 10:49:38,653 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 1, 1, 1, 1] [2023-12-20 10:49:38,655 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 10:49:38,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 10:49:38 BoogieIcfgContainer [2023-12-20 10:49:38,669 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 10:49:38,669 INFO L158 Benchmark]: Toolchain (without parser) took 887101.64ms. Allocated memory was 310.4MB in the beginning and 373.3MB in the end (delta: 62.9MB). Free memory was 268.1MB in the beginning and 190.9MB in the end (delta: 77.2MB). Peak memory consumption was 141.0MB. Max. memory is 8.0GB. [2023-12-20 10:49:38,669 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 188.7MB. Free memory is still 141.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 10:49:38,669 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.82ms. Allocated memory is still 310.4MB. Free memory was 268.0MB in the beginning and 256.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 10:49:38,669 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.77ms. Allocated memory is still 310.4MB. Free memory was 256.4MB in the beginning and 254.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 10:49:38,670 INFO L158 Benchmark]: Boogie Preprocessor took 26.83ms. Allocated memory is still 310.4MB. Free memory was 254.4MB in the beginning and 252.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 10:49:38,670 INFO L158 Benchmark]: RCFGBuilder took 271.72ms. Allocated memory is still 310.4MB. Free memory was 252.2MB in the beginning and 236.7MB in the end (delta: 15.6MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-20 10:49:38,670 INFO L158 Benchmark]: TraceAbstraction took 886563.82ms. Allocated memory was 310.4MB in the beginning and 373.3MB in the end (delta: 62.9MB). Free memory was 236.1MB in the beginning and 190.9MB in the end (delta: 45.2MB). Peak memory consumption was 108.5MB. Max. memory is 8.0GB. [2023-12-20 10:49:38,671 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 188.7MB. Free memory is still 141.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.82ms. Allocated memory is still 310.4MB. Free memory was 268.0MB in the beginning and 256.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 45.77ms. Allocated memory is still 310.4MB. Free memory was 256.4MB in the beginning and 254.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.83ms. Allocated memory is still 310.4MB. Free memory was 254.4MB in the beginning and 252.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 271.72ms. Allocated memory is still 310.4MB. Free memory was 252.2MB in the beginning and 236.7MB in the end (delta: 15.6MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 886563.82ms. Allocated memory was 310.4MB in the beginning and 373.3MB in the end (delta: 62.9MB). Free memory was 236.1MB in the beginning and 190.9MB in the end (delta: 45.2MB). Peak memory consumption was 108.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 15). Cancelled while NwaCegarLoop was analyzing trace of length 27 with TraceHistMax 7,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 886.5s, OverallIterations: 13, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 14.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 837 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 837 mSDsluCounter, 811 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 664 mSDsCounter, 353 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1729 IncrementalHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 353 mSolverCounterUnsat, 147 mSDtfsCounter, 1729 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 486 GetRequests, 235 SyntacticMatches, 9 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=12, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 259 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 372 ConstructedInterpolants, 4 QuantifiedInterpolants, 7212 SizeOfPredicates, 98 NumberOfNonLiveVariables, 1730 ConjunctsInSsa, 275 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 89/197 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown