/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/recursified_nla-digbench/recursified_cohencu-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:44:53,929 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:44:53,993 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:44:53,996 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:44:53,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:44:54,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:44:54,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:44:54,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:44:54,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:44:54,022 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:44:54,022 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:44:54,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:44:54,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:44:54,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:44:54,024 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:44:54,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:44:54,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:44:54,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:44:54,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:44:54,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:44:54,025 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:44:54,025 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:44:54,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:44:54,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:44:54,026 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:44:54,026 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:44:54,026 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:44:54,026 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:44:54,027 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:44:54,027 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:44:54,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:44:54,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:44:54,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:44:54,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:44:54,028 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:44:54,028 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:44:54,029 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:44:54,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:44:54,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:44:54,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:44:54,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:44:54,284 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:44:54,284 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:44:54,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohencu-ll.c [2023-12-21 10:44:55,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:44:55,517 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:44:55,517 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohencu-ll.c [2023-12-21 10:44:55,522 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872ecd59a/049ac9e1c524428a87b8a68393bc624f/FLAGe7856a106 [2023-12-21 10:44:55,533 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872ecd59a/049ac9e1c524428a87b8a68393bc624f [2023-12-21 10:44:55,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:44:55,537 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:44:55,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:44:55,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:44:55,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:44:55,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c16578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55, skipping insertion in model container [2023-12-21 10:44:55,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,568 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:44:55,676 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2023-12-21 10:44:55,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:44:55,710 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:44:55,717 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2023-12-21 10:44:55,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:44:55,738 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:44:55,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55 WrapperNode [2023-12-21 10:44:55,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:44:55,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:44:55,739 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:44:55,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:44:55,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,767 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2023-12-21 10:44:55,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:44:55,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:44:55,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:44:55,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:44:55,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,776 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,785 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 11, 15, 5, 12, 21]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 2, 1, 2, 2]. [2023-12-21 10:44:55,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,800 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,801 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:44:55,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:44:55,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:44:55,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:44:55,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (1/1) ... [2023-12-21 10:44:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:44:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:44:55,825 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) [2023-12-21 10:44:55,838 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 [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 10:44:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2023-12-21 10:44:55,858 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2023-12-21 10:44:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:44:55,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 10:44:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 10:44:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 10:44:55,937 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:44:55,939 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:44:56,177 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:44:56,207 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:44:56,207 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 10:44:56,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:44:56 BoogieIcfgContainer [2023-12-21 10:44:56,207 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:44:56,209 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:44:56,209 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:44:56,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:44:56,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:44:55" (1/3) ... [2023-12-21 10:44:56,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aec8fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:44:56, skipping insertion in model container [2023-12-21 10:44:56,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:44:55" (2/3) ... [2023-12-21 10:44:56,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aec8fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:44:56, skipping insertion in model container [2023-12-21 10:44:56,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:44:56" (3/3) ... [2023-12-21 10:44:56,212 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2023-12-21 10:44:56,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:44:56,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:44:56,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:44:56,264 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;@433434fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:44:56,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:44:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-21 10:44:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-21 10:44:56,272 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:44:56,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:44:56,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:44:56,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:44:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1371458259, now seen corresponding path program 1 times [2023-12-21 10:44:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:44:56,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321356194] [2023-12-21 10:44:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:44:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:44:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:44:56,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:44:56,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321356194] [2023-12-21 10:44:56,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321356194] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:44:56,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:44:56,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 10:44:56,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664511229] [2023-12-21 10:44:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:44:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:44:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:44:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:44:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 10:44:56,959 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 10:44:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:44:57,233 INFO L93 Difference]: Finished difference Result 106 states and 168 transitions. [2023-12-21 10:44:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 10:44:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-21 10:44:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:44:57,239 INFO L225 Difference]: With dead ends: 106 [2023-12-21 10:44:57,239 INFO L226 Difference]: Without dead ends: 67 [2023-12-21 10:44:57,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 10:44:57,244 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:44:57,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 141 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:44:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-21 10:44:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-12-21 10:44:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-21 10:44:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2023-12-21 10:44:57,295 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 8 [2023-12-21 10:44:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:44:57,295 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2023-12-21 10:44:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 10:44:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2023-12-21 10:44:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 10:44:57,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:44:57,296 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:44:57,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:44:57,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:44:57,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:44:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1638005840, now seen corresponding path program 1 times [2023-12-21 10:44:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:44:57,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307349937] [2023-12-21 10:44:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:57,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:44:57,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:44:57,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739565420] [2023-12-21 10:44:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:57,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:44:57,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:44:57,316 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) [2023-12-21 10:44:57,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:44:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:44:57,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-21 10:44:57,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:44:57,469 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 [2023-12-21 10:44:57,473 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 [2023-12-21 10:44:57,478 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 [2023-12-21 10:44:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:44:57,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:44:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:44:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307349937] [2023-12-21 10:44:57,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:44:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739565420] [2023-12-21 10:44:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739565420] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:44:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:44:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-21 10:44:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054288718] [2023-12-21 10:44:57,884 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:44:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:44:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:44:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:44:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:44:57,886 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:44:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:44:58,331 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2023-12-21 10:44:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 10:44:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-21 10:44:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:44:58,333 INFO L225 Difference]: With dead ends: 79 [2023-12-21 10:44:58,333 INFO L226 Difference]: Without dead ends: 77 [2023-12-21 10:44:58,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-12-21 10:44:58,334 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:44:58,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 132 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:44:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-21 10:44:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-12-21 10:44:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-21 10:44:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2023-12-21 10:44:58,346 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 14 [2023-12-21 10:44:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:44:58,346 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2023-12-21 10:44:58,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:44:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2023-12-21 10:44:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 10:44:58,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:44:58,347 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:44:58,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 10:44:58,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:44:58,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:44:58,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:44:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1652518129, now seen corresponding path program 1 times [2023-12-21 10:44:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:44:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026672264] [2023-12-21 10:44:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:58,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:44:58,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:44:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931200684] [2023-12-21 10:44:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:58,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:44:58,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:44:58,569 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) [2023-12-21 10:44:58,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:44:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:44:58,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-21 10:44:58,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:44:58,656 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 [2023-12-21 10:44:58,677 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 [2023-12-21 10:44:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:44:58,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:44:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:44:58,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:44:58,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026672264] [2023-12-21 10:44:58,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:44:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931200684] [2023-12-21 10:44:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931200684] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 10:44:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:44:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-12-21 10:44:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111959046] [2023-12-21 10:44:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:44:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:44:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:44:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:44:58,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-21 10:44:58,990 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 10:44:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:44:59,161 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-12-21 10:44:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 10:44:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-21 10:44:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:44:59,162 INFO L225 Difference]: With dead ends: 81 [2023-12-21 10:44:59,163 INFO L226 Difference]: Without dead ends: 79 [2023-12-21 10:44:59,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:44:59,164 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:44:59,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:44:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-21 10:44:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-21 10:44:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-21 10:44:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2023-12-21 10:44:59,173 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 20 [2023-12-21 10:44:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:44:59,173 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2023-12-21 10:44:59,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-21 10:44:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2023-12-21 10:44:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 10:44:59,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:44:59,174 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:44:59,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:44:59,379 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,SelfDestructingSolverStorable2 [2023-12-21 10:44:59,379 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:44:59,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:44:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1440093584, now seen corresponding path program 1 times [2023-12-21 10:44:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:44:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214971868] [2023-12-21 10:44:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:44:59,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:44:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419399364] [2023-12-21 10:44:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:44:59,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:44:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:44:59,391 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) [2023-12-21 10:44:59,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 10:44:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:44:59,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-21 10:44:59,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:44:59,526 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 [2023-12-21 10:44:59,534 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 [2023-12-21 10:44:59,540 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 15 treesize of output 1 [2023-12-21 10:44:59,544 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 [2023-12-21 10:45:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:45:00,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:45:04,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:04,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214971868] [2023-12-21 10:45:04,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419399364] [2023-12-21 10:45:04,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419399364] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:45:04,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:45:04,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-12-21 10:45:04,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443183803] [2023-12-21 10:45:04,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:04,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 10:45:04,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 10:45:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=560, Unknown=1, NotChecked=0, Total=650 [2023-12-21 10:45:04,717 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 26 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 10:45:10,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:45:18,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:45:25,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:45:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:25,817 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2023-12-21 10:45:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 10:45:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2023-12-21 10:45:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:25,819 INFO L225 Difference]: With dead ends: 109 [2023-12-21 10:45:25,820 INFO L226 Difference]: Without dead ends: 107 [2023-12-21 10:45:25,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=263, Invalid=1457, Unknown=2, NotChecked=0, Total=1722 [2023-12-21 10:45:25,821 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 57 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:25,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 178 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 643 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2023-12-21 10:45:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-21 10:45:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-12-21 10:45:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2023-12-21 10:45:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2023-12-21 10:45:25,846 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 26 [2023-12-21 10:45:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:25,860 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2023-12-21 10:45:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 10:45:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2023-12-21 10:45:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 10:45:25,861 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:25,862 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:25,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:26,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:26,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1224682067, now seen corresponding path program 1 times [2023-12-21 10:45:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488263757] [2023-12-21 10:45:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:26,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:26,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388246169] [2023-12-21 10:45:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:26,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:26,081 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) [2023-12-21 10:45:26,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 10:45:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:45:26,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-21 10:45:26,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:26,184 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 [2023-12-21 10:45:26,188 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 [2023-12-21 10:45:26,192 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 [2023-12-21 10:45:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 10:45:26,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 10:45:30,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:30,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488263757] [2023-12-21 10:45:30,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:30,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388246169] [2023-12-21 10:45:30,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388246169] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:45:30,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:45:30,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-21 10:45:30,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313596850] [2023-12-21 10:45:30,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:30,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 10:45:30,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:30,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 10:45:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=428, Unknown=1, NotChecked=0, Total=506 [2023-12-21 10:45:30,979 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 19 states have internal predecessors, (31), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-21 10:45:35,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:45:43,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:45:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:45,354 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2023-12-21 10:45:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 10:45:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 19 states have internal predecessors, (31), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2023-12-21 10:45:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:45,355 INFO L225 Difference]: With dead ends: 121 [2023-12-21 10:45:45,355 INFO L226 Difference]: Without dead ends: 119 [2023-12-21 10:45:45,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=197, Invalid=991, Unknown=2, NotChecked=0, Total=1190 [2023-12-21 10:45:45,357 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:45,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 116 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 513 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2023-12-21 10:45:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-21 10:45:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-12-21 10:45:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 74 states have internal predecessors, (76), 30 states have call successors, (30), 12 states have call predecessors, (30), 15 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2023-12-21 10:45:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2023-12-21 10:45:45,390 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 32 [2023-12-21 10:45:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:45,391 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2023-12-21 10:45:45,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 19 states have internal predecessors, (31), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-21 10:45:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2023-12-21 10:45:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 10:45:45,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:45,392 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:45,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:45,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:45,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:45,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:45,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1299588988, now seen corresponding path program 1 times [2023-12-21 10:45:45,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:45,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498688838] [2023-12-21 10:45:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:45,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:45,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:45,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758983912] [2023-12-21 10:45:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:45,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:45,615 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) [2023-12-21 10:45:45,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 10:45:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:45:45,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-21 10:45:45,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:45,737 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 [2023-12-21 10:45:45,741 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 [2023-12-21 10:45:46,029 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 19 treesize of output 11 [2023-12-21 10:45:46,036 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 19 treesize of output 11 [2023-12-21 10:45:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 10:45:46,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-21 10:45:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498688838] [2023-12-21 10:45:46,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758983912] [2023-12-21 10:45:46,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758983912] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:45:46,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:45:46,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-12-21 10:45:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287230780] [2023-12-21 10:45:46,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:46,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 10:45:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 10:45:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:45:46,284 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-21 10:45:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:47,125 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2023-12-21 10:45:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 10:45:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 42 [2023-12-21 10:45:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:47,127 INFO L225 Difference]: With dead ends: 125 [2023-12-21 10:45:47,127 INFO L226 Difference]: Without dead ends: 123 [2023-12-21 10:45:47,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-12-21 10:45:47,129 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:47,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 230 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 10:45:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-21 10:45:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-12-21 10:45:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 30 states have call successors, (30), 13 states have call predecessors, (30), 16 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2023-12-21 10:45:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2023-12-21 10:45:47,166 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 42 [2023-12-21 10:45:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:47,168 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2023-12-21 10:45:47,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-21 10:45:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2023-12-21 10:45:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 10:45:47,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:47,171 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:47,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:47,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:47,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:47,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash 277886434, now seen corresponding path program 1 times [2023-12-21 10:45:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172742892] [2023-12-21 10:45:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:47,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735291835] [2023-12-21 10:45:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:47,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:47,401 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) [2023-12-21 10:45:47,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 10:45:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:45:47,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 10:45:47,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:47,496 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 [2023-12-21 10:45:47,500 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 [2023-12-21 10:45:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 10:45:47,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:45:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172742892] [2023-12-21 10:45:47,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735291835] [2023-12-21 10:45:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735291835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:45:47,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:45:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 10:45:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240900024] [2023-12-21 10:45:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:45:47,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 10:45:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:47,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 10:45:47,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 10:45:47,605 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:45:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:47,858 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2023-12-21 10:45:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 10:45:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-12-21 10:45:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:47,861 INFO L225 Difference]: With dead ends: 127 [2023-12-21 10:45:47,861 INFO L226 Difference]: Without dead ends: 125 [2023-12-21 10:45:47,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-21 10:45:47,862 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:47,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 62 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:45:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-21 10:45:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-12-21 10:45:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 80 states have internal predecessors, (82), 30 states have call successors, (30), 14 states have call predecessors, (30), 17 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2023-12-21 10:45:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2023-12-21 10:45:47,890 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 42 [2023-12-21 10:45:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:47,891 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2023-12-21 10:45:47,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:45:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2023-12-21 10:45:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-21 10:45:47,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:47,897 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:47,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:48,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:48,103 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:48,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash -560035385, now seen corresponding path program 2 times [2023-12-21 10:45:48,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:48,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596967005] [2023-12-21 10:45:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:48,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153786318] [2023-12-21 10:45:48,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:45:48,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:48,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:48,121 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) [2023-12-21 10:45:48,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 10:45:48,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:45:48,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:45:48,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-21 10:45:48,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:48,253 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 [2023-12-21 10:45:48,259 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 [2023-12-21 10:45:48,263 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 [2023-12-21 10:45:48,814 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 19 treesize of output 11 [2023-12-21 10:45:48,820 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 19 treesize of output 11 [2023-12-21 10:45:48,826 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 19 treesize of output 11 [2023-12-21 10:45:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 10:45:49,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 10:45:49,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:49,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596967005] [2023-12-21 10:45:49,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:49,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153786318] [2023-12-21 10:45:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153786318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:45:49,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:45:49,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2023-12-21 10:45:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048121572] [2023-12-21 10:45:49,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:49,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 10:45:49,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 10:45:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:45:49,331 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-21 10:45:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:50,798 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2023-12-21 10:45:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 10:45:50,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 48 [2023-12-21 10:45:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:50,800 INFO L225 Difference]: With dead ends: 163 [2023-12-21 10:45:50,800 INFO L226 Difference]: Without dead ends: 161 [2023-12-21 10:45:50,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 10:45:50,801 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:50,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 293 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 10:45:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-21 10:45:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2023-12-21 10:45:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 101 states have internal predecessors, (104), 36 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2023-12-21 10:45:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2023-12-21 10:45:50,823 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 48 [2023-12-21 10:45:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:50,825 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2023-12-21 10:45:50,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-21 10:45:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2023-12-21 10:45:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-21 10:45:50,826 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:50,826 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:50,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:51,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:51,032 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:51,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1232163489, now seen corresponding path program 1 times [2023-12-21 10:45:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781307189] [2023-12-21 10:45:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:51,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:51,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:51,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132751070] [2023-12-21 10:45:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:51,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:51,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:51,050 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) [2023-12-21 10:45:51,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 10:45:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:45:51,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 10:45:51,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:51,150 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 [2023-12-21 10:45:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 10:45:51,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:51,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:51,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781307189] [2023-12-21 10:45:51,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:51,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132751070] [2023-12-21 10:45:51,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132751070] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:45:51,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:45:51,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-21 10:45:51,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896048316] [2023-12-21 10:45:51,388 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 10:45:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 10:45:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:45:51,389 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 10:45:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:51,752 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2023-12-21 10:45:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:45:51,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-12-21 10:45:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:51,754 INFO L225 Difference]: With dead ends: 165 [2023-12-21 10:45:51,754 INFO L226 Difference]: Without dead ends: 163 [2023-12-21 10:45:51,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:45:51,755 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:51,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 134 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:45:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-21 10:45:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2023-12-21 10:45:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 104 states have internal predecessors, (107), 36 states have call successors, (36), 20 states have call predecessors, (36), 23 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2023-12-21 10:45:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2023-12-21 10:45:51,794 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 48 [2023-12-21 10:45:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:51,794 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2023-12-21 10:45:51,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 10:45:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2023-12-21 10:45:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 10:45:51,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:51,802 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:52,016 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,SelfDestructingSolverStorable8 [2023-12-21 10:45:52,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:52,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1233992248, now seen corresponding path program 3 times [2023-12-21 10:45:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986230737] [2023-12-21 10:45:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:52,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:52,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13525136] [2023-12-21 10:45:52,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:45:52,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:52,029 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) [2023-12-21 10:45:52,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 10:45:52,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 10:45:52,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:45:52,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 122 conjunts are in the unsatisfiable core [2023-12-21 10:45:52,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:52,143 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 [2023-12-21 10:45:52,149 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 [2023-12-21 10:45:52,155 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 [2023-12-21 10:45:52,160 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 [2023-12-21 10:45:52,778 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 19 treesize of output 11 [2023-12-21 10:45:52,786 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 19 treesize of output 11 [2023-12-21 10:45:52,791 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 19 treesize of output 11 [2023-12-21 10:45:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-21 10:45:53,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-21 10:45:53,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:53,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986230737] [2023-12-21 10:45:53,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:53,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13525136] [2023-12-21 10:45:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13525136] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:45:53,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:45:53,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2023-12-21 10:45:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839149366] [2023-12-21 10:45:53,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:53,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 10:45:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 10:45:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:45:53,283 INFO L87 Difference]: Start difference. First operand 161 states and 182 transitions. Second operand has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-21 10:45:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:54,921 INFO L93 Difference]: Finished difference Result 211 states and 243 transitions. [2023-12-21 10:45:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 10:45:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 54 [2023-12-21 10:45:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:54,925 INFO L225 Difference]: With dead ends: 211 [2023-12-21 10:45:54,925 INFO L226 Difference]: Without dead ends: 209 [2023-12-21 10:45:54,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 10:45:54,926 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 173 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:54,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 370 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 10:45:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-21 10:45:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2023-12-21 10:45:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 127 states have (on average 1.062992125984252) internal successors, (135), 132 states have internal predecessors, (135), 48 states have call successors, (48), 24 states have call predecessors, (48), 29 states have return successors, (55), 48 states have call predecessors, (55), 45 states have call successors, (55) [2023-12-21 10:45:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 238 transitions. [2023-12-21 10:45:54,953 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 238 transitions. Word has length 54 [2023-12-21 10:45:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:54,953 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 238 transitions. [2023-12-21 10:45:54,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (20), 9 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-21 10:45:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 238 transitions. [2023-12-21 10:45:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 10:45:54,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:54,954 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:54,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 10:45:55,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 10:45:55,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:55,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1062890782, now seen corresponding path program 1 times [2023-12-21 10:45:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:55,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107281280] [2023-12-21 10:45:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:55,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104074775] [2023-12-21 10:45:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:55,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:55,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:55,171 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) [2023-12-21 10:45:55,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 10:45:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:45:55,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-21 10:45:55,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:55,319 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 15 treesize of output 1 [2023-12-21 10:45:55,322 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 [2023-12-21 10:45:55,325 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 [2023-12-21 10:45:55,331 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 [2023-12-21 10:45:56,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:45:56,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-12-21 10:45:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 43 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 10:45:56,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:45:57,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:45:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107281280] [2023-12-21 10:45:57,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:45:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104074775] [2023-12-21 10:45:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104074775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:45:57,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:45:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-21 10:45:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028317644] [2023-12-21 10:45:57,334 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:45:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 10:45:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:45:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 10:45:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:45:57,335 INFO L87 Difference]: Start difference. First operand 205 states and 238 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 10:45:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:45:58,500 INFO L93 Difference]: Finished difference Result 213 states and 244 transitions. [2023-12-21 10:45:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 10:45:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2023-12-21 10:45:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:45:58,502 INFO L225 Difference]: With dead ends: 213 [2023-12-21 10:45:58,502 INFO L226 Difference]: Without dead ends: 211 [2023-12-21 10:45:58,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2023-12-21 10:45:58,503 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:45:58,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 57 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 10:45:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-12-21 10:45:58,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-12-21 10:45:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 135 states have internal predecessors, (138), 48 states have call successors, (48), 25 states have call predecessors, (48), 30 states have return successors, (55), 48 states have call predecessors, (55), 45 states have call successors, (55) [2023-12-21 10:45:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 241 transitions. [2023-12-21 10:45:58,537 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 241 transitions. Word has length 54 [2023-12-21 10:45:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:45:58,538 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 241 transitions. [2023-12-21 10:45:58,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 10:45:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 241 transitions. [2023-12-21 10:45:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 10:45:58,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:45:58,538 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:45:58,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-21 10:45:58,743 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,SelfDestructingSolverStorable10 [2023-12-21 10:45:58,743 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:45:58,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:45:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1669742887, now seen corresponding path program 1 times [2023-12-21 10:45:58,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:45:58,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472534859] [2023-12-21 10:45:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:45:58,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:45:58,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037371809] [2023-12-21 10:45:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:45:58,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:45:58,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:45:58,753 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) [2023-12-21 10:45:58,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 10:45:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:45:58,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-21 10:45:58,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:45:58,869 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 [2023-12-21 10:45:58,872 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 [2023-12-21 10:45:58,875 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 [2023-12-21 10:45:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 75 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 10:45:59,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:46:04,290 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 68 treesize of output 56 [2023-12-21 10:46:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:46:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472534859] [2023-12-21 10:46:05,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:46:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037371809] [2023-12-21 10:46:05,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037371809] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:46:05,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:46:05,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-21 10:46:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117714237] [2023-12-21 10:46:05,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:46:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 10:46:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:46:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 10:46:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2023-12-21 10:46:05,130 INFO L87 Difference]: Start difference. First operand 209 states and 241 transitions. Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 10:46:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:46:06,367 INFO L93 Difference]: Finished difference Result 217 states and 247 transitions. [2023-12-21 10:46:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:46:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2023-12-21 10:46:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:46:06,369 INFO L225 Difference]: With dead ends: 217 [2023-12-21 10:46:06,369 INFO L226 Difference]: Without dead ends: 215 [2023-12-21 10:46:06,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=215, Invalid=1044, Unknown=1, NotChecked=0, Total=1260 [2023-12-21 10:46:06,370 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:46:06,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 87 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 10:46:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-21 10:46:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2023-12-21 10:46:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 138 states have internal predecessors, (141), 48 states have call successors, (48), 26 states have call predecessors, (48), 31 states have return successors, (55), 48 states have call predecessors, (55), 45 states have call successors, (55) [2023-12-21 10:46:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2023-12-21 10:46:06,410 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 60 [2023-12-21 10:46:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:46:06,410 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2023-12-21 10:46:06,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 10:46:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2023-12-21 10:46:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 10:46:06,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:46:06,411 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:46:06,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 10:46:06,616 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,SelfDestructingSolverStorable11 [2023-12-21 10:46:06,616 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:46:06,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:46:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash -422813358, now seen corresponding path program 1 times [2023-12-21 10:46:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:46:06,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538067507] [2023-12-21 10:46:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:46:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:46:06,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:46:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948723529] [2023-12-21 10:46:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:46:06,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:46:06,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:46:06,645 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) [2023-12-21 10:46:06,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 10:46:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:46:06,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-21 10:46:06,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:46:06,805 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 [2023-12-21 10:46:06,811 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 15 treesize of output 1 [2023-12-21 10:46:06,814 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 [2023-12-21 10:46:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 10:46:07,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:46:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:46:12,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538067507] [2023-12-21 10:46:12,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:46:12,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948723529] [2023-12-21 10:46:12,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948723529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:46:12,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:46:12,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-21 10:46:12,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100964142] [2023-12-21 10:46:12,728 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:46:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 10:46:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:46:12,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 10:46:12,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=610, Unknown=1, NotChecked=0, Total=702 [2023-12-21 10:46:12,729 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-21 10:46:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:46:14,917 INFO L93 Difference]: Finished difference Result 221 states and 250 transitions. [2023-12-21 10:46:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 10:46:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2023-12-21 10:46:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:46:14,918 INFO L225 Difference]: With dead ends: 221 [2023-12-21 10:46:14,918 INFO L226 Difference]: Without dead ends: 217 [2023-12-21 10:46:14,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=240, Invalid=1481, Unknown=1, NotChecked=0, Total=1722 [2023-12-21 10:46:14,921 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:46:14,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 76 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 10:46:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-12-21 10:46:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2023-12-21 10:46:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 135 states have (on average 1.0518518518518518) internal successors, (142), 139 states have internal predecessors, (142), 48 states have call successors, (48), 27 states have call predecessors, (48), 31 states have return successors, (55), 48 states have call predecessors, (55), 45 states have call successors, (55) [2023-12-21 10:46:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2023-12-21 10:46:14,979 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 66 [2023-12-21 10:46:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:46:14,980 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2023-12-21 10:46:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-21 10:46:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2023-12-21 10:46:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 10:46:14,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:46:14,980 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:46:14,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 10:46:15,185 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,SelfDestructingSolverStorable12 [2023-12-21 10:46:15,185 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:46:15,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:46:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1635143177, now seen corresponding path program 1 times [2023-12-21 10:46:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:46:15,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638380428] [2023-12-21 10:46:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:46:15,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:46:15,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:46:15,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625933822] [2023-12-21 10:46:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:46:15,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:46:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:46:15,210 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) [2023-12-21 10:46:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 10:46:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:46:15,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-21 10:46:15,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:46:15,362 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 15 treesize of output 1 [2023-12-21 10:46:15,367 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 15 treesize of output 1 [2023-12-21 10:46:15,370 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 [2023-12-21 10:46:15,376 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 [2023-12-21 10:46:17,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:46:17,740 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 23 treesize of output 27 [2023-12-21 10:46:18,672 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 30 treesize of output 18 [2023-12-21 10:46:18,676 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 30 treesize of output 18 [2023-12-21 10:46:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 126 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-21 10:46:18,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:46:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-12-21 10:46:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:46:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638380428] [2023-12-21 10:46:34,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:46:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625933822] [2023-12-21 10:46:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625933822] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:46:34,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:46:34,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2023-12-21 10:46:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048285995] [2023-12-21 10:46:34,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:46:34,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 10:46:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:46:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 10:46:34,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=868, Unknown=1, NotChecked=0, Total=992 [2023-12-21 10:46:34,135 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand has 32 states, 25 states have (on average 2.44) internal successors, (61), 30 states have internal predecessors, (61), 14 states have call successors, (24), 7 states have call predecessors, (24), 10 states have return successors, (22), 6 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-21 10:46:54,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:46:58,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:47:13,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:47:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:47:24,560 INFO L93 Difference]: Finished difference Result 227 states and 255 transitions. [2023-12-21 10:47:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 10:47:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.44) internal successors, (61), 30 states have internal predecessors, (61), 14 states have call successors, (24), 7 states have call predecessors, (24), 10 states have return successors, (22), 6 states have call predecessors, (22), 12 states have call successors, (22) Word has length 72 [2023-12-21 10:47:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:47:24,562 INFO L225 Difference]: With dead ends: 227 [2023-12-21 10:47:24,562 INFO L226 Difference]: Without dead ends: 183 [2023-12-21 10:47:24,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 104 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=573, Invalid=3208, Unknown=1, NotChecked=0, Total=3782 [2023-12-21 10:47:24,566 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 121 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2023-12-21 10:47:24,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 85 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 700 Invalid, 11 Unknown, 0 Unchecked, 23.9s Time] [2023-12-21 10:47:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-12-21 10:47:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2023-12-21 10:47:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 117 states have internal predecessors, (120), 41 states have call successors, (41), 22 states have call predecessors, (41), 26 states have return successors, (48), 41 states have call predecessors, (48), 39 states have call successors, (48) [2023-12-21 10:47:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 209 transitions. [2023-12-21 10:47:24,648 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 209 transitions. Word has length 72 [2023-12-21 10:47:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:47:24,648 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 209 transitions. [2023-12-21 10:47:24,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.44) internal successors, (61), 30 states have internal predecessors, (61), 14 states have call successors, (24), 7 states have call predecessors, (24), 10 states have return successors, (22), 6 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-21 10:47:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 209 transitions. [2023-12-21 10:47:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-21 10:47:24,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:24,649 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:24,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 10:47:24,854 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,SelfDestructingSolverStorable13 [2023-12-21 10:47:24,855 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:24,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1552443822, now seen corresponding path program 1 times [2023-12-21 10:47:24,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:24,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153541199] [2023-12-21 10:47:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:24,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:24,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:47:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012348280] [2023-12-21 10:47:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:24,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:24,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:47:24,897 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:47:24,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 10:47:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:25,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-21 10:47:25,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:47:25,045 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 [2023-12-21 10:47:25,052 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 [2023-12-21 10:47:25,345 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 19 treesize of output 11 [2023-12-21 10:47:25,351 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 19 treesize of output 11 [2023-12-21 10:47:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-12-21 10:47:25,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:47:25,739 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 16 treesize of output 12 [2023-12-21 10:47:25,743 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 12 treesize of output 8 [2023-12-21 10:47:25,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:47:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153541199] [2023-12-21 10:47:25,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:47:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012348280] [2023-12-21 10:47:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012348280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:47:25,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:47:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-21 10:47:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003484380] [2023-12-21 10:47:25,806 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:47:25,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 10:47:25,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:47:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 10:47:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-21 10:47:25,807 INFO L87 Difference]: Start difference. First operand 181 states and 209 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-21 10:47:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:47:26,272 INFO L93 Difference]: Finished difference Result 187 states and 214 transitions. [2023-12-21 10:47:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:47:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2023-12-21 10:47:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:47:26,276 INFO L225 Difference]: With dead ends: 187 [2023-12-21 10:47:26,276 INFO L226 Difference]: Without dead ends: 185 [2023-12-21 10:47:26,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:47:26,278 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:47:26,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 73 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 10:47:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-21 10:47:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-12-21 10:47:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 120 states have internal predecessors, (123), 41 states have call successors, (41), 23 states have call predecessors, (41), 27 states have return successors, (48), 41 states have call predecessors, (48), 39 states have call successors, (48) [2023-12-21 10:47:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2023-12-21 10:47:26,372 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 78 [2023-12-21 10:47:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:47:26,372 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2023-12-21 10:47:26,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-21 10:47:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2023-12-21 10:47:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-21 10:47:26,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:26,373 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:26,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-21 10:47:26,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:26,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:26,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1062306451, now seen corresponding path program 1 times [2023-12-21 10:47:26,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:26,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12673154] [2023-12-21 10:47:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:26,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:47:26,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537429947] [2023-12-21 10:47:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:26,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:26,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:47:26,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:47:26,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 10:47:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:26,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 143 conjunts are in the unsatisfiable core [2023-12-21 10:47:26,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:47:26,813 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 48 treesize of output 35 [2023-12-21 10:47:26,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:47:26,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:47:26,830 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 [2023-12-21 10:47:26,835 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 [2023-12-21 10:47:26,840 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 [2023-12-21 10:47:26,846 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 [2023-12-21 10:47:28,162 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 11 treesize of output 7 [2023-12-21 10:47:29,093 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 19 treesize of output 11 [2023-12-21 10:47:29,102 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 19 treesize of output 11 [2023-12-21 10:47:29,113 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 19 treesize of output 11 [2023-12-21 10:47:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-21 10:47:29,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:47:38,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:47:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12673154] [2023-12-21 10:47:38,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:47:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537429947] [2023-12-21 10:47:38,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537429947] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:47:38,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:47:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-21 10:47:38,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493633304] [2023-12-21 10:47:38,576 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:47:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 10:47:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:47:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 10:47:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 10:47:38,577 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-21 10:47:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:47:41,755 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2023-12-21 10:47:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 10:47:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2023-12-21 10:47:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:47:41,756 INFO L225 Difference]: With dead ends: 193 [2023-12-21 10:47:41,756 INFO L226 Difference]: Without dead ends: 191 [2023-12-21 10:47:41,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 10:47:41,757 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:47:41,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 76 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-21 10:47:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-21 10:47:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2023-12-21 10:47:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 123 states have internal predecessors, (126), 41 states have call successors, (41), 24 states have call predecessors, (41), 28 states have return successors, (48), 41 states have call predecessors, (48), 39 states have call successors, (48) [2023-12-21 10:47:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2023-12-21 10:47:41,808 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 84 [2023-12-21 10:47:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:47:41,808 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2023-12-21 10:47:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-21 10:47:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2023-12-21 10:47:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-21 10:47:41,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:47:41,810 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:41,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 10:47:42,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 10:47:42,015 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:47:42,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:47:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2113450262, now seen corresponding path program 1 times [2023-12-21 10:47:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:47:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75176772] [2023-12-21 10:47:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:47:42,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:47:42,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850686019] [2023-12-21 10:47:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:47:42,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:47:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:47:42,049 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:47:42,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 10:47:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:47:42,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-21 10:47:42,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:47:42,215 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 [2023-12-21 10:47:42,223 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 15 treesize of output 1 [2023-12-21 10:47:42,226 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 [2023-12-21 10:47:42,231 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 [2023-12-21 10:47:42,754 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 11 treesize of output 7 [2023-12-21 10:47:55,669 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 19 treesize of output 11 [2023-12-21 10:47:55,676 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 19 treesize of output 11 [2023-12-21 10:47:55,691 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 19 treesize of output 11 [2023-12-21 10:47:55,770 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 10:47:55,770 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 28 treesize of output 16 [2023-12-21 10:47:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 155 proven. 77 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-21 10:47:56,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:48:03,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:48:03,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75176772] [2023-12-21 10:48:03,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:48:03,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850686019] [2023-12-21 10:48:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850686019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:48:03,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:48:03,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 10:48:03,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843212416] [2023-12-21 10:48:03,943 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:48:03,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 10:48:03,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:48:03,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 10:48:03,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=668, Unknown=4, NotChecked=0, Total=756 [2023-12-21 10:48:03,944 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand has 25 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 8 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-21 10:48:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:48:06,457 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2023-12-21 10:48:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 10:48:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 8 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 90 [2023-12-21 10:48:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:48:06,458 INFO L225 Difference]: With dead ends: 197 [2023-12-21 10:48:06,458 INFO L226 Difference]: Without dead ends: 195 [2023-12-21 10:48:06,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=253, Invalid=1813, Unknown=4, NotChecked=0, Total=2070 [2023-12-21 10:48:06,459 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 37 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:48:06,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 81 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 838 Invalid, 10 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 10:48:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-21 10:48:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2023-12-21 10:48:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 122 states have (on average 1.0573770491803278) internal successors, (129), 126 states have internal predecessors, (129), 41 states have call successors, (41), 25 states have call predecessors, (41), 29 states have return successors, (48), 41 states have call predecessors, (48), 39 states have call successors, (48) [2023-12-21 10:48:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2023-12-21 10:48:06,512 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 90 [2023-12-21 10:48:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:48:06,512 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2023-12-21 10:48:06,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 8 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-21 10:48:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2023-12-21 10:48:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-21 10:48:06,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:48:06,513 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-21 10:48:06,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-21 10:48:06,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 10:48:06,718 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:48:06,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:48:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -606700578, now seen corresponding path program 4 times [2023-12-21 10:48:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:48:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804694759] [2023-12-21 10:48:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:48:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:48:06,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:48:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052362678] [2023-12-21 10:48:06,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:48:06,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:48:06,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:48:06,736 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:48:06,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 10:48:07,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:48:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:48:07,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 176 conjunts are in the unsatisfiable core [2023-12-21 10:48:07,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:48:07,077 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 [2023-12-21 10:48:07,081 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 [2023-12-21 10:48:07,089 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 [2023-12-21 10:48:07,093 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 [2023-12-21 10:48:07,748 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 19 treesize of output 11 [2023-12-21 10:48:07,753 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 19 treesize of output 11 [2023-12-21 10:48:07,757 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 19 treesize of output 11 [2023-12-21 10:48:07,762 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 7 treesize of output 3 [2023-12-21 10:48:08,403 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 19 treesize of output 11 [2023-12-21 10:48:08,416 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-21 10:48:08,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2023-12-21 10:48:08,441 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-21 10:48:08,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2023-12-21 10:48:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 10 proven. 296 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-21 10:48:08,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:48:13,951 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 64 treesize of output 44 [2023-12-21 10:48:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 40 proven. 54 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-21 10:48:15,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:48:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804694759] [2023-12-21 10:48:15,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:48:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052362678] [2023-12-21 10:48:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052362678] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:48:15,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:48:15,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2023-12-21 10:48:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734915769] [2023-12-21 10:48:15,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:48:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 10:48:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:48:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 10:48:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1139, Unknown=1, NotChecked=0, Total=1260 [2023-12-21 10:48:15,426 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand has 36 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 27 states have internal predecessors, (70), 14 states have call successors, (34), 13 states have call predecessors, (34), 7 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-12-21 10:48:22,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-12-21 10:48:30,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-12-21 10:48:49,632 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:49:02,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:49:10,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:49:18,777 WARN L293 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:50:46,342 WARN L293 SmtUtils]: Spent 35.10s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:50:50,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 10:50:55,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 10:51:00,453 WARN L293 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:51:04,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 10:51:19,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:23,465 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_int#1| c_func_to_recursive_line_29_to_41_0_~x.base) c_func_to_recursive_line_29_to_41_0_~x.offset)) (.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_29_to_41_0_~z.base) c_func_to_recursive_line_29_to_41_0_~z.offset)) (.cse2 (select (select |c_#memory_int#2| c_func_to_recursive_line_29_to_41_0_~y.base) c_func_to_recursive_line_29_to_41_0_~y.offset))) (let ((.cse5 (select (select |c_#memory_int#2| |c_func_to_recursive_line_29_to_41_0_#in~y.base|) |c_func_to_recursive_line_29_to_41_0_#in~y.offset|)) (.cse6 (select (select |c_#memory_int#1| |c_func_to_recursive_line_29_to_41_0_#in~x.base|) |c_func_to_recursive_line_29_to_41_0_#in~x.offset|)) (.cse3 (* .cse0 .cse2)) (.cse1 (* .cse7 18))) (and (= (+ (* .cse0 4) .cse1 (* .cse2 24)) (+ (* .cse0 .cse0) .cse3 6)) (= (let ((.cse4 (select (select |c_#memory_int#4| |c_func_to_recursive_line_29_to_41_0_#in~n.base|) |c_func_to_recursive_line_29_to_41_0_#in~n.offset|))) (+ (* (* .cse4 .cse4) 6) (* .cse5 .cse4) 3 (* .cse4 8))) (+ (* .cse5 3) (* 3 .cse6))) (= (+ (* 3 .cse2) (* .cse7 3)) (let ((.cse8 (select (select |c_#memory_int#4| c_func_to_recursive_line_29_to_41_0_~n.base) c_func_to_recursive_line_29_to_41_0_~n.offset))) (+ (* .cse8 .cse2) 3 (* .cse8 8) (* 6 (* .cse8 .cse8))))) (= (let ((.cse9 (select (select |c_#memory_int#5| |c_func_to_recursive_line_29_to_41_0_#in~z.base|) |c_func_to_recursive_line_29_to_41_0_#in~z.offset|))) (+ (* 2 .cse9) (* .cse5 .cse9))) (+ 6 (* .cse5 12) (* .cse6 18))) (= (+ .cse3 (* 2 .cse0)) (+ .cse1 (* 12 .cse2) 6))))) is different from false [2023-12-21 10:51:28,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:32,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 10:51:36,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 10:51:38,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:41,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:49,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:52,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:56,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:51:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:51:57,165 INFO L93 Difference]: Finished difference Result 275 states and 313 transitions. [2023-12-21 10:51:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-21 10:51:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 27 states have internal predecessors, (70), 14 states have call successors, (34), 13 states have call predecessors, (34), 7 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 94 [2023-12-21 10:51:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:51:57,167 INFO L225 Difference]: With dead ends: 275 [2023-12-21 10:51:57,167 INFO L226 Difference]: Without dead ends: 273 [2023-12-21 10:51:57,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 134 SyntacticMatches, 21 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 163.9s TimeCoverageRelationStatistics Valid=658, Invalid=4886, Unknown=10, NotChecked=146, Total=5700 [2023-12-21 10:51:57,168 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 328 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 185 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 64.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:51:57,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 372 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1442 Invalid, 11 Unknown, 33 Unchecked, 64.6s Time] [2023-12-21 10:51:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-21 10:51:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 253. [2023-12-21 10:51:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 160 states have (on average 1.05625) internal successors, (169), 166 states have internal predecessors, (169), 53 states have call successors, (53), 33 states have call predecessors, (53), 39 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2023-12-21 10:51:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 287 transitions. [2023-12-21 10:51:57,242 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 287 transitions. Word has length 94 [2023-12-21 10:51:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:51:57,242 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 287 transitions. [2023-12-21 10:51:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 27 states have internal predecessors, (70), 14 states have call successors, (34), 13 states have call predecessors, (34), 7 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-12-21 10:51:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 287 transitions. [2023-12-21 10:51:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-21 10:51:57,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:51:57,243 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:51:57,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 10:51:57,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 10:51:57,449 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:51:57,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:51:57,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1347348571, now seen corresponding path program 1 times [2023-12-21 10:51:57,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:51:57,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975170202] [2023-12-21 10:51:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:51:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:51:57,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:51:57,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276300094] [2023-12-21 10:51:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:51:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:51:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:51:57,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:51:57,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 10:51:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:51:57,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 117 conjunts are in the unsatisfiable core [2023-12-21 10:51:57,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:51:57,650 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 [2023-12-21 10:51:57,655 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 [2023-12-21 10:51:57,662 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 [2023-12-21 10:51:57,668 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 [2023-12-21 10:51:58,348 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 19 treesize of output 11 [2023-12-21 10:51:58,356 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 19 treesize of output 11 [2023-12-21 10:51:58,364 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 19 treesize of output 11 [2023-12-21 10:51:58,370 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 19 treesize of output 11 [2023-12-21 10:51:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 140 proven. 26 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-21 10:51:58,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:52:15,677 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 92 treesize of output 68 [2023-12-21 10:52:15,716 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 68 treesize of output 60 [2023-12-21 10:52:15,723 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 60 treesize of output 44 [2023-12-21 10:52:15,730 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 44 treesize of output 40 [2023-12-21 10:52:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:52:21,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975170202] [2023-12-21 10:52:21,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:52:21,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276300094] [2023-12-21 10:52:21,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276300094] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:52:21,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:52:21,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-21 10:52:21,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818979502] [2023-12-21 10:52:21,368 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:52:21,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 10:52:21,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:52:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 10:52:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=559, Unknown=1, NotChecked=0, Total=650 [2023-12-21 10:52:21,369 INFO L87 Difference]: Start difference. First operand 253 states and 287 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-21 10:52:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:52:22,591 INFO L93 Difference]: Finished difference Result 261 states and 293 transitions. [2023-12-21 10:52:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:52:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 96 [2023-12-21 10:52:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:52:22,593 INFO L225 Difference]: With dead ends: 261 [2023-12-21 10:52:22,593 INFO L226 Difference]: Without dead ends: 257 [2023-12-21 10:52:22,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=165, Invalid=890, Unknown=1, NotChecked=0, Total=1056 [2023-12-21 10:52:22,594 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 10:52:22,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 368 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 10:52:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-21 10:52:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2023-12-21 10:52:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 162 states have (on average 1.0493827160493827) internal successors, (170), 167 states have internal predecessors, (170), 53 states have call successors, (53), 34 states have call predecessors, (53), 39 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2023-12-21 10:52:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 288 transitions. [2023-12-21 10:52:22,678 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 288 transitions. Word has length 96 [2023-12-21 10:52:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:52:22,679 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 288 transitions. [2023-12-21 10:52:22,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-21 10:52:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 288 transitions. [2023-12-21 10:52:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-21 10:52:22,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:52:22,680 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:52:22,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-21 10:52:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:22,886 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:52:22,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:52:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1063718626, now seen corresponding path program 1 times [2023-12-21 10:52:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:52:22,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454808276] [2023-12-21 10:52:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:52:22,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:52:22,905 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:52:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81360558] [2023-12-21 10:52:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:52:22,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:22,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:52:22,908 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:52:22,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 10:52:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:52:23,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-21 10:52:23,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:52:23,105 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 [2023-12-21 10:52:23,110 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 [2023-12-21 10:52:23,378 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 21 treesize of output 13 [2023-12-21 10:52:23,809 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 19 treesize of output 11 [2023-12-21 10:52:23,824 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 19 treesize of output 11 [2023-12-21 10:52:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 198 proven. 41 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-12-21 10:52:24,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:52:33,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:52:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454808276] [2023-12-21 10:52:33,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:52:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81360558] [2023-12-21 10:52:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81360558] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:52:33,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:52:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 10:52:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954560282] [2023-12-21 10:52:33,926 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:52:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 10:52:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:52:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 10:52:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2023-12-21 10:52:33,927 INFO L87 Difference]: Start difference. First operand 255 states and 288 transitions. Second operand has 22 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-21 10:52:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:52:36,735 INFO L93 Difference]: Finished difference Result 257 states and 289 transitions. [2023-12-21 10:52:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 10:52:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 102 [2023-12-21 10:52:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:52:36,741 INFO L225 Difference]: With dead ends: 257 [2023-12-21 10:52:36,741 INFO L226 Difference]: Without dead ends: 223 [2023-12-21 10:52:36,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=289, Invalid=2062, Unknown=1, NotChecked=0, Total=2352 [2023-12-21 10:52:36,752 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:52:36,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 101 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 732 Invalid, 4 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 10:52:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-21 10:52:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-12-21 10:52:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 141 states have (on average 1.049645390070922) internal successors, (148), 146 states have internal predecessors, (148), 48 states have call successors, (48), 29 states have call predecessors, (48), 33 states have return successors, (59), 47 states have call predecessors, (59), 47 states have call successors, (59) [2023-12-21 10:52:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2023-12-21 10:52:36,822 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 102 [2023-12-21 10:52:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:52:36,823 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2023-12-21 10:52:36,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-21 10:52:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2023-12-21 10:52:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-21 10:52:36,823 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:52:36,823 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:52:36,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-21 10:52:37,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:37,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:52:37,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:52:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1229980934, now seen corresponding path program 2 times [2023-12-21 10:52:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:52:37,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925670692] [2023-12-21 10:52:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:52:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:52:37,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:52:37,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684790804] [2023-12-21 10:52:37,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:52:37,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:37,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:52:37,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:52:37,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 10:52:37,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:52:37,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:52:37,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-21 10:52:37,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:52:37,255 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 [2023-12-21 10:52:37,259 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 [2023-12-21 10:52:37,731 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 19 treesize of output 11 [2023-12-21 10:52:37,737 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 19 treesize of output 11 [2023-12-21 10:52:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-21 10:52:37,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:52:38,479 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 16 treesize of output 12 [2023-12-21 10:52:38,485 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 12 treesize of output 8 [2023-12-21 10:52:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:52:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925670692] [2023-12-21 10:52:38,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:52:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684790804] [2023-12-21 10:52:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684790804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:52:38,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:52:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-21 10:52:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044257399] [2023-12-21 10:52:38,709 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:52:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 10:52:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:52:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 10:52:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:52:38,712 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-21 10:52:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:52:39,317 INFO L93 Difference]: Finished difference Result 243 states and 284 transitions. [2023-12-21 10:52:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 10:52:39,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 114 [2023-12-21 10:52:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:52:39,318 INFO L225 Difference]: With dead ends: 243 [2023-12-21 10:52:39,318 INFO L226 Difference]: Without dead ends: 241 [2023-12-21 10:52:39,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-21 10:52:39,319 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:52:39,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 10:52:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-12-21 10:52:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2023-12-21 10:52:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 146 states have (on average 1.047945205479452) internal successors, (153), 151 states have internal predecessors, (153), 49 states have call successors, (49), 30 states have call predecessors, (49), 35 states have return successors, (66), 49 states have call predecessors, (66), 48 states have call successors, (66) [2023-12-21 10:52:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 268 transitions. [2023-12-21 10:52:39,434 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 268 transitions. Word has length 114 [2023-12-21 10:52:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:52:39,434 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 268 transitions. [2023-12-21 10:52:39,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-21 10:52:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 268 transitions. [2023-12-21 10:52:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-21 10:52:39,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:52:39,448 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:52:39,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 10:52:39,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-21 10:52:39,655 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:52:39,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:52:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1115757127, now seen corresponding path program 2 times [2023-12-21 10:52:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:52:39,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698973390] [2023-12-21 10:52:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:52:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:52:39,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:52:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634157549] [2023-12-21 10:52:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:52:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:52:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:52:39,670 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:52:39,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 10:52:39,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:52:39,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:52:39,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 216 conjunts are in the unsatisfiable core [2023-12-21 10:52:39,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:52:39,907 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 [2023-12-21 10:52:39,913 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 [2023-12-21 10:52:39,920 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 [2023-12-21 10:52:39,925 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 48 treesize of output 35 [2023-12-21 10:52:39,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:52:39,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:52:39,962 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 [2023-12-21 10:52:43,388 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 15 treesize of output 11 [2023-12-21 10:52:43,393 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 40 treesize of output 17 [2023-12-21 10:52:43,396 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 [2023-12-21 10:52:44,771 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 19 treesize of output 11 [2023-12-21 10:52:44,791 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 19 treesize of output 11 [2023-12-21 10:52:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 151 proven. 191 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-12-21 10:52:45,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:53:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:53:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698973390] [2023-12-21 10:53:35,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:53:35,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634157549] [2023-12-21 10:53:35,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634157549] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:53:35,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:53:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 10:53:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468734424] [2023-12-21 10:53:35,014 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:53:35,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 10:53:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:53:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 10:53:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=980, Unknown=5, NotChecked=0, Total=1122 [2023-12-21 10:53:35,015 INFO L87 Difference]: Start difference. First operand 231 states and 268 transitions. Second operand has 26 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 9 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2023-12-21 10:53:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:53:40,742 INFO L93 Difference]: Finished difference Result 253 states and 292 transitions. [2023-12-21 10:53:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 10:53:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 9 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 120 [2023-12-21 10:53:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:53:40,745 INFO L225 Difference]: With dead ends: 253 [2023-12-21 10:53:40,745 INFO L226 Difference]: Without dead ends: 251 [2023-12-21 10:53:40,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=339, Invalid=2206, Unknown=5, NotChecked=0, Total=2550 [2023-12-21 10:53:40,747 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:53:40,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 89 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-21 10:53:40,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-21 10:53:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2023-12-21 10:53:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 157 states have (on average 1.0509554140127388) internal successors, (165), 162 states have internal predecessors, (165), 54 states have call successors, (54), 32 states have call predecessors, (54), 37 states have return successors, (70), 54 states have call predecessors, (70), 52 states have call successors, (70) [2023-12-21 10:53:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 289 transitions. [2023-12-21 10:53:40,828 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 289 transitions. Word has length 120 [2023-12-21 10:53:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:53:40,828 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 289 transitions. [2023-12-21 10:53:40,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 9 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2023-12-21 10:53:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 289 transitions. [2023-12-21 10:53:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-21 10:53:40,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:53:40,829 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:53:40,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 10:53:41,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-21 10:53:41,035 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:53:41,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:53:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash -549237194, now seen corresponding path program 2 times [2023-12-21 10:53:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:53:41,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877112488] [2023-12-21 10:53:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:53:41,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:53:41,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:53:41,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379188684] [2023-12-21 10:53:41,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:53:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:53:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:53:41,063 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:53:41,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 10:53:41,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:53:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:53:41,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 184 conjunts are in the unsatisfiable core [2023-12-21 10:53:41,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:53:41,310 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 [2023-12-21 10:53:41,318 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 [2023-12-21 10:53:41,325 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 [2023-12-21 10:53:41,336 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 48 treesize of output 35 [2023-12-21 10:53:41,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:53:41,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:53:44,316 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 15 treesize of output 11 [2023-12-21 10:53:44,319 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 40 treesize of output 17 [2023-12-21 10:53:44,321 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 [2023-12-21 10:53:45,509 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 19 treesize of output 11 [2023-12-21 10:53:45,533 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 19 treesize of output 11 [2023-12-21 10:53:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 192 proven. 210 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-21 10:53:46,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:53:54,629 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 66 treesize of output 54 [2023-12-21 10:53:54,639 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 54 treesize of output 50 [2023-12-21 10:53:54,647 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 50 treesize of output 42 [2023-12-21 10:53:58,698 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_29_to_41_0_#in~z.base|))) (let ((.cse4 (select .cse6 |c_func_to_recursive_line_29_to_41_0_#in~z.offset|)) (.cse7 (forall ((|v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_71| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_64| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_64| Int) (|v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_71| Int)) (let ((.cse10 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_64|) |v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_64|))) (= (let ((.cse9 (select (select |c_#memory_int#5| |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_98|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_98|))) (+ (* .cse9 2) (* .cse9 .cse10))) (+ (* .cse10 6) (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_71|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_71|) 2) 10))))) (.cse8 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_29_to_41_0_#in~n.base|) |c_func_to_recursive_line_29_to_41_0_#in~n.offset|))) (and (forall ((|v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_71| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_64| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_64| Int) (|v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_71| Int)) (let ((.cse1 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_64|) |v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_64|))) (let ((.cse2 (* .cse1 6))) (or (= (let ((.cse0 (select (select |c_#memory_int#5| |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_98|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_98|))) (+ (* .cse0 2) (* .cse0 .cse1))) (+ .cse2 (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_71|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_71|) 2) 10)) (not (= (+ (* (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_29_to_41_0_#in~y.base| (let ((.cse3 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_29_to_41_0_#in~y.base|))) (store .cse3 |c_func_to_recursive_line_29_to_41_0_#in~y.offset| (+ (select .cse3 |c_func_to_recursive_line_29_to_41_0_#in~y.offset|) .cse4)))) |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_71|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_71|) 2) .cse2 10) (let ((.cse5 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_29_to_41_0_#in~z.base| (store .cse6 |c_func_to_recursive_line_29_to_41_0_#in~z.offset| (+ .cse4 6))) |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_98|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_98|))) (+ (* .cse1 .cse5) (* 2 .cse5))))))))) (or .cse7 (= .cse4 (+ 6 (* .cse8 6)))) (or .cse7 (= .cse8 (select (select |c_#memory_int#3| |c_func_to_recursive_line_29_to_41_0_#in~a.base|) |c_func_to_recursive_line_29_to_41_0_#in~a.offset|)))))) is different from false [2023-12-21 10:53:59,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:53:59,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877112488] [2023-12-21 10:53:59,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:53:59,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379188684] [2023-12-21 10:53:59,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379188684] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:53:59,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:53:59,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 10:53:59,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670578455] [2023-12-21 10:53:59,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:53:59,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 10:53:59,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:53:59,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 10:53:59,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=935, Unknown=2, NotChecked=62, Total=1122 [2023-12-21 10:53:59,286 INFO L87 Difference]: Start difference. First operand 249 states and 289 transitions. Second operand has 25 states, 20 states have (on average 2.25) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 6 states have call predecessors, (20), 8 states have call successors, (20) [2023-12-21 10:54:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:54:04,203 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2023-12-21 10:54:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 10:54:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.25) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 6 states have call predecessors, (20), 8 states have call successors, (20) Word has length 126 [2023-12-21 10:54:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:54:04,205 INFO L225 Difference]: With dead ends: 257 [2023-12-21 10:54:04,205 INFO L226 Difference]: Without dead ends: 255 [2023-12-21 10:54:04,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 107 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=308, Invalid=2144, Unknown=2, NotChecked=96, Total=2550 [2023-12-21 10:54:04,206 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:54:04,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 89 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 766 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-12-21 10:54:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-12-21 10:54:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2023-12-21 10:54:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 160 states have (on average 1.05) internal successors, (168), 165 states have internal predecessors, (168), 54 states have call successors, (54), 33 states have call predecessors, (54), 38 states have return successors, (70), 54 states have call predecessors, (70), 52 states have call successors, (70) [2023-12-21 10:54:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 292 transitions. [2023-12-21 10:54:04,307 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 292 transitions. Word has length 126 [2023-12-21 10:54:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:54:04,307 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 292 transitions. [2023-12-21 10:54:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.25) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 6 states have call predecessors, (20), 8 states have call successors, (20) [2023-12-21 10:54:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 292 transitions. [2023-12-21 10:54:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-21 10:54:04,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:54:04,308 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:54:04,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-21 10:54:04,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:54:04,515 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:54:04,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:54:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash -32805391, now seen corresponding path program 2 times [2023-12-21 10:54:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:54:04,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085674734] [2023-12-21 10:54:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:54:04,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:54:04,533 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:54:04,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761917692] [2023-12-21 10:54:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:54:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:54:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:54:04,554 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:54:04,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 10:54:04,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:54:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:54:04,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 201 conjunts are in the unsatisfiable core [2023-12-21 10:54:04,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:54:04,812 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 [2023-12-21 10:54:04,839 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 [2023-12-21 10:54:04,845 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 [2023-12-21 10:54:04,853 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 15 treesize of output 1 [2023-12-21 10:54:04,869 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 [2023-12-21 10:54:08,018 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 27 treesize of output 19 [2023-12-21 10:54:08,020 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 11 treesize of output 7 [2023-12-21 10:54:08,701 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 19 treesize of output 11 [2023-12-21 10:54:08,707 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 19 treesize of output 11 [2023-12-21 10:54:08,712 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 19 treesize of output 11 [2023-12-21 10:54:09,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:09,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2023-12-21 10:54:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 150 proven. 327 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-12-21 10:54:09,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:54:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:54:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085674734] [2023-12-21 10:54:10,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:54:10,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761917692] [2023-12-21 10:54:10,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761917692] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:54:10,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:54:10,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 10:54:10,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379349313] [2023-12-21 10:54:10,529 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:54:10,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 10:54:10,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:54:10,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 10:54:10,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-12-21 10:54:10,530 INFO L87 Difference]: Start difference. First operand 253 states and 292 transitions. Second operand has 26 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 23 states have internal predecessors, (52), 11 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2023-12-21 10:54:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:54:15,078 INFO L93 Difference]: Finished difference Result 261 states and 298 transitions. [2023-12-21 10:54:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 10:54:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 23 states have internal predecessors, (52), 11 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 132 [2023-12-21 10:54:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:54:15,080 INFO L225 Difference]: With dead ends: 261 [2023-12-21 10:54:15,080 INFO L226 Difference]: Without dead ends: 259 [2023-12-21 10:54:15,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 10:54:15,081 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 74 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:54:15,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 90 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 771 Invalid, 3 Unknown, 0 Unchecked, 2.2s Time] [2023-12-21 10:54:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-21 10:54:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2023-12-21 10:54:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 163 states have (on average 1.049079754601227) internal successors, (171), 168 states have internal predecessors, (171), 54 states have call successors, (54), 34 states have call predecessors, (54), 39 states have return successors, (70), 54 states have call predecessors, (70), 52 states have call successors, (70) [2023-12-21 10:54:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 295 transitions. [2023-12-21 10:54:15,182 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 295 transitions. Word has length 132 [2023-12-21 10:54:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:54:15,183 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 295 transitions. [2023-12-21 10:54:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 23 states have internal predecessors, (52), 11 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2023-12-21 10:54:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 295 transitions. [2023-12-21 10:54:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-21 10:54:15,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:54:15,183 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:54:15,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 10:54:15,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:54:15,390 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:54:15,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:54:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1874091626, now seen corresponding path program 2 times [2023-12-21 10:54:15,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:54:15,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134867958] [2023-12-21 10:54:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:54:15,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:54:15,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:54:15,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641270098] [2023-12-21 10:54:15,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:54:15,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:54:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:54:15,405 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:54:15,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 10:54:15,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:54:15,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:54:15,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-21 10:54:15,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:54:15,650 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 [2023-12-21 10:54:15,654 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 [2023-12-21 10:54:16,464 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 7 treesize of output 3 [2023-12-21 10:54:16,920 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 37 treesize of output 29 [2023-12-21 10:54:16,922 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 47 treesize of output 23 [2023-12-21 10:54:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 302 proven. 96 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-12-21 10:54:16,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:54:20,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:20,380 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 60 treesize of output 63 [2023-12-21 10:54:20,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:20,392 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 52 treesize of output 39 [2023-12-21 10:54:25,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:25,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 103 [2023-12-21 10:54:25,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:25,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 91 [2023-12-21 10:54:25,733 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 16 treesize of output 12 [2023-12-21 10:54:25,736 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 12 treesize of output 8 [2023-12-21 10:54:29,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:29,950 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 60 treesize of output 63 [2023-12-21 10:54:29,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:54:29,971 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 52 treesize of output 39 [2023-12-21 10:54:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 114 proven. 69 refuted. 3 times theorem prover too weak. 582 trivial. 0 not checked. [2023-12-21 10:54:43,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:54:43,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134867958] [2023-12-21 10:54:43,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:54:43,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641270098] [2023-12-21 10:54:43,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641270098] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:54:43,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:54:43,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2023-12-21 10:54:43,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031848647] [2023-12-21 10:54:43,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:54:43,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 10:54:43,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:54:43,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 10:54:43,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=823, Unknown=5, NotChecked=0, Total=930 [2023-12-21 10:54:43,099 INFO L87 Difference]: Start difference. First operand 257 states and 295 transitions. Second operand has 31 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 28 states have internal predecessors, (68), 15 states have call successors, (37), 6 states have call predecessors, (37), 7 states have return successors, (36), 9 states have call predecessors, (36), 13 states have call successors, (36) [2023-12-21 10:54:50,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:54:52,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:54:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:54:55,950 INFO L93 Difference]: Finished difference Result 269 states and 305 transitions. [2023-12-21 10:54:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 10:54:55,950 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 28 states have internal predecessors, (68), 15 states have call successors, (37), 6 states have call predecessors, (37), 7 states have return successors, (36), 9 states have call predecessors, (36), 13 states have call successors, (36) Word has length 138 [2023-12-21 10:54:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:54:55,951 INFO L225 Difference]: With dead ends: 269 [2023-12-21 10:54:55,951 INFO L226 Difference]: Without dead ends: 265 [2023-12-21 10:54:55,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 241 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=383, Invalid=2264, Unknown=5, NotChecked=0, Total=2652 [2023-12-21 10:54:55,952 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:54:55,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 99 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 734 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2023-12-21 10:54:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-21 10:54:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2023-12-21 10:54:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 172 states have internal predecessors, (175), 54 states have call successors, (54), 36 states have call predecessors, (54), 40 states have return successors, (70), 54 states have call predecessors, (70), 52 states have call successors, (70) [2023-12-21 10:54:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2023-12-21 10:54:56,069 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 138 [2023-12-21 10:54:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:54:56,069 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2023-12-21 10:54:56,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 28 states have internal predecessors, (68), 15 states have call successors, (37), 6 states have call predecessors, (37), 7 states have return successors, (36), 9 states have call predecessors, (36), 13 states have call successors, (36) [2023-12-21 10:54:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2023-12-21 10:54:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-21 10:54:56,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:54:56,070 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:54:56,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 10:54:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-21 10:54:56,276 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:54:56,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:54:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash -549316319, now seen corresponding path program 1 times [2023-12-21 10:54:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:54:56,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260946032] [2023-12-21 10:54:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:54:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:54:56,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:54:56,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204557072] [2023-12-21 10:54:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:54:56,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:54:56,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:54:56,291 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:54:56,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 10:54:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:54:56,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 180 conjunts are in the unsatisfiable core [2023-12-21 10:54:56,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:54:56,574 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 [2023-12-21 10:54:56,583 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 [2023-12-21 10:54:56,589 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 [2023-12-21 10:54:56,596 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 [2023-12-21 10:54:57,505 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 15 treesize of output 11 [2023-12-21 10:54:57,636 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 15 treesize of output 11 [2023-12-21 10:54:57,796 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 15 treesize of output 11 [2023-12-21 10:54:57,940 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 15 treesize of output 11 [2023-12-21 10:55:02,944 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 19 treesize of output 11 [2023-12-21 10:55:02,949 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 19 treesize of output 11 [2023-12-21 10:55:02,957 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 19 treesize of output 11 [2023-12-21 10:55:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 341 proven. 185 refuted. 76 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-21 10:55:41,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:55:42,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:55:42,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260946032] [2023-12-21 10:55:42,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:55:42,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204557072] [2023-12-21 10:55:42,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204557072] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:55:42,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:55:42,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 10:55:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728619316] [2023-12-21 10:55:42,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:55:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 10:55:42,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:55:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 10:55:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=570, Unknown=5, NotChecked=0, Total=650 [2023-12-21 10:55:42,397 INFO L87 Difference]: Start difference. First operand 263 states and 299 transitions. Second operand has 22 states, 17 states have (on average 3.0) internal successors, (51), 20 states have internal predecessors, (51), 10 states have call successors, (24), 6 states have call predecessors, (24), 8 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2023-12-21 10:55:47,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:56:36,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:56:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:37,282 INFO L93 Difference]: Finished difference Result 267 states and 301 transitions. [2023-12-21 10:56:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 10:56:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 20 states have internal predecessors, (51), 10 states have call successors, (24), 6 states have call predecessors, (24), 8 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) Word has length 144 [2023-12-21 10:56:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:37,283 INFO L225 Difference]: With dead ends: 267 [2023-12-21 10:56:37,283 INFO L226 Difference]: Without dead ends: 225 [2023-12-21 10:56:37,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 89.3s TimeCoverageRelationStatistics Valid=242, Invalid=1633, Unknown=17, NotChecked=0, Total=1892 [2023-12-21 10:56:37,284 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 55 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:37,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 118 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 751 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2023-12-21 10:56:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-12-21 10:56:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2023-12-21 10:56:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 146 states have internal predecessors, (148), 48 states have call successors, (48), 30 states have call predecessors, (48), 32 states have return successors, (62), 46 states have call predecessors, (62), 47 states have call successors, (62) [2023-12-21 10:56:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 258 transitions. [2023-12-21 10:56:37,377 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 258 transitions. Word has length 144 [2023-12-21 10:56:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:37,378 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 258 transitions. [2023-12-21 10:56:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 20 states have internal predecessors, (51), 10 states have call successors, (24), 6 states have call predecessors, (24), 8 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2023-12-21 10:56:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 258 transitions. [2023-12-21 10:56:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-21 10:56:37,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:37,379 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:37,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:37,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 10:56:37,586 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:37,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1400944186, now seen corresponding path program 3 times [2023-12-21 10:56:37,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:37,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323678279] [2023-12-21 10:56:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:37,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328790927] [2023-12-21 10:56:37,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:56:37,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:37,607 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:56:37,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 10:56:37,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:56:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:56:37,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 149 conjunts are in the unsatisfiable core [2023-12-21 10:56:37,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:37,960 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 [2023-12-21 10:56:37,967 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 [2023-12-21 10:56:38,857 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 19 treesize of output 11 [2023-12-21 10:56:38,863 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 19 treesize of output 11 [2023-12-21 10:56:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 66 proven. 104 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2023-12-21 10:56:38,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:56:40,441 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 16 treesize of output 12 [2023-12-21 10:56:40,446 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 12 treesize of output 8 [2023-12-21 10:56:43,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:43,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323678279] [2023-12-21 10:56:43,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:43,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328790927] [2023-12-21 10:56:43,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328790927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:56:43,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:56:43,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 10:56:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238470907] [2023-12-21 10:56:43,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:56:43,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 10:56:43,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 10:56:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-12-21 10:56:43,153 INFO L87 Difference]: Start difference. First operand 223 states and 258 transitions. Second operand has 17 states, 13 states have (on average 2.923076923076923) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-21 10:56:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:43,915 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2023-12-21 10:56:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:56:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.923076923076923) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 150 [2023-12-21 10:56:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:43,917 INFO L225 Difference]: With dead ends: 243 [2023-12-21 10:56:43,917 INFO L226 Difference]: Without dead ends: 241 [2023-12-21 10:56:43,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-12-21 10:56:43,918 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:43,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 96 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 10:56:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-12-21 10:56:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2023-12-21 10:56:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 147 states have (on average 1.0408163265306123) internal successors, (153), 151 states have internal predecessors, (153), 49 states have call successors, (49), 31 states have call predecessors, (49), 34 states have return successors, (70), 48 states have call predecessors, (70), 48 states have call successors, (70) [2023-12-21 10:56:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 272 transitions. [2023-12-21 10:56:44,024 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 272 transitions. Word has length 150 [2023-12-21 10:56:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:44,025 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 272 transitions. [2023-12-21 10:56:44,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.923076923076923) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-21 10:56:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 272 transitions. [2023-12-21 10:56:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-21 10:56:44,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:44,025 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-12-21 10:56:44,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:44,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 10:56:44,232 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:44,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1842925005, now seen corresponding path program 5 times [2023-12-21 10:56:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:44,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245463752] [2023-12-21 10:56:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:44,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:44,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:44,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574709435] [2023-12-21 10:56:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 10:56:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:44,274 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:56:44,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 10:56:44,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-21 10:56:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:56:44,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 314 conjunts are in the unsatisfiable core [2023-12-21 10:56:44,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:44,755 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 [2023-12-21 10:56:44,761 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 [2023-12-21 10:56:44,766 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 [2023-12-21 10:56:44,772 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 [2023-12-21 10:56:45,466 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 19 treesize of output 11 [2023-12-21 10:56:45,472 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 19 treesize of output 11 [2023-12-21 10:56:45,477 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 19 treesize of output 11 [2023-12-21 10:56:45,485 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 19 treesize of output 11 [2023-12-21 10:56:46,165 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 19 treesize of output 11 [2023-12-21 10:56:46,176 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 19 treesize of output 11 [2023-12-21 10:56:46,182 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 19 treesize of output 11 [2023-12-21 10:56:46,189 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 19 treesize of output 11 [2023-12-21 10:56:46,953 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 19 treesize of output 11 [2023-12-21 10:56:46,957 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 19 treesize of output 11 [2023-12-21 10:56:46,963 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 19 treesize of output 11 [2023-12-21 10:56:46,970 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 19 treesize of output 11 [2023-12-21 10:56:47,790 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 19 treesize of output 11 [2023-12-21 10:56:47,795 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 19 treesize of output 11 [2023-12-21 10:56:47,801 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 19 treesize of output 11 [2023-12-21 10:56:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 12 proven. 926 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-12-21 10:56:48,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:56:48,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245463752] [2023-12-21 10:56:48,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574709435] [2023-12-21 10:56:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574709435] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:56:48,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:56:48,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-12-21 10:56:48,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166819161] [2023-12-21 10:56:48,645 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:56:48,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 10:56:48,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 10:56:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 10:56:48,646 INFO L87 Difference]: Start difference. First operand 231 states and 272 transitions. Second operand has 30 states, 25 states have (on average 2.44) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (28), 12 states have call predecessors, (28), 7 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-21 10:56:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:51,520 INFO L93 Difference]: Finished difference Result 323 states and 355 transitions. [2023-12-21 10:56:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 10:56:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.44) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (28), 12 states have call predecessors, (28), 7 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 156 [2023-12-21 10:56:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:51,521 INFO L225 Difference]: With dead ends: 323 [2023-12-21 10:56:51,521 INFO L226 Difference]: Without dead ends: 321 [2023-12-21 10:56:51,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 91 SyntacticMatches, 37 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 10:56:51,522 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 118 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:51,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 530 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-21 10:56:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-12-21 10:56:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 297. [2023-12-21 10:56:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 191 states have (on average 1.036649214659686) internal successors, (198), 195 states have internal predecessors, (198), 54 states have call successors, (54), 42 states have call predecessors, (54), 51 states have return successors, (75), 59 states have call predecessors, (75), 52 states have call successors, (75) [2023-12-21 10:56:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 327 transitions. [2023-12-21 10:56:51,629 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 327 transitions. Word has length 156 [2023-12-21 10:56:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:51,629 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 327 transitions. [2023-12-21 10:56:51,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.44) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (28), 12 states have call predecessors, (28), 7 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-21 10:56:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 327 transitions. [2023-12-21 10:56:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-21 10:56:51,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:51,630 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:51,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:51,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-21 10:56:51,838 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:51,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash 697494405, now seen corresponding path program 3 times [2023-12-21 10:56:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:51,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660581384] [2023-12-21 10:56:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:51,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:51,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:51,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175948133] [2023-12-21 10:56:51,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:56:51,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:51,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:51,869 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:56:51,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 10:56:52,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:56:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:56:52,196 WARN L260 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 271 conjunts are in the unsatisfiable core [2023-12-21 10:56:52,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:52,218 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 48 treesize of output 35 [2023-12-21 10:56:52,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:56:52,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:56:52,238 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 [2023-12-21 10:56:52,243 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 [2023-12-21 10:56:52,255 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 [2023-12-21 10:56:52,262 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 [2023-12-21 10:56:55,749 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 11 treesize of output 7 [2023-12-21 10:56:57,210 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 19 treesize of output 11 [2023-12-21 10:56:57,232 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 19 treesize of output 11 [2023-12-21 10:56:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 106 proven. 128 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2023-12-21 10:56:57,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:57:08,537 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 123 treesize of output 111 [2023-12-21 10:57:08,547 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 111 treesize of output 87 [2023-12-21 10:57:08,557 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 87 treesize of output 75 [2023-12-21 10:57:08,565 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 75 treesize of output 71 [2023-12-21 10:57:16,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:57:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660581384] [2023-12-21 10:57:16,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:57:16,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175948133] [2023-12-21 10:57:16,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175948133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:57:16,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:57:16,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-21 10:57:16,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225708829] [2023-12-21 10:57:16,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:57:16,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 10:57:16,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:57:16,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 10:57:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=946, Unknown=2, NotChecked=0, Total=1056 [2023-12-21 10:57:16,006 INFO L87 Difference]: Start difference. First operand 297 states and 327 transitions. Second operand has 24 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 10:57:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:57:20,383 INFO L93 Difference]: Finished difference Result 305 states and 333 transitions. [2023-12-21 10:57:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 10:57:20,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 156 [2023-12-21 10:57:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:57:20,385 INFO L225 Difference]: With dead ends: 305 [2023-12-21 10:57:20,385 INFO L226 Difference]: Without dead ends: 303 [2023-12-21 10:57:20,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=226, Invalid=1752, Unknown=2, NotChecked=0, Total=1980 [2023-12-21 10:57:20,386 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-21 10:57:20,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 112 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-21 10:57:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-12-21 10:57:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2023-12-21 10:57:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 194 states have (on average 1.0360824742268042) internal successors, (201), 198 states have internal predecessors, (201), 54 states have call successors, (54), 43 states have call predecessors, (54), 52 states have return successors, (75), 59 states have call predecessors, (75), 52 states have call successors, (75) [2023-12-21 10:57:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 330 transitions. [2023-12-21 10:57:20,520 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 330 transitions. Word has length 156 [2023-12-21 10:57:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:57:20,521 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 330 transitions. [2023-12-21 10:57:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 10:57:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 330 transitions. [2023-12-21 10:57:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-21 10:57:20,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:57:20,521 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:57:20,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-21 10:57:20,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-21 10:57:20,728 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:57:20,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:57:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1829319934, now seen corresponding path program 3 times [2023-12-21 10:57:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:57:20,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973782016] [2023-12-21 10:57:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:57:20,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:57:20,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:57:20,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045454248] [2023-12-21 10:57:20,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:57:20,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:57:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:57:20,752 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:57:20,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-21 10:57:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:57:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:57:21,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 243 conjunts are in the unsatisfiable core [2023-12-21 10:57:21,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:57:21,213 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 [2023-12-21 10:57:21,221 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 [2023-12-21 10:57:21,229 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 [2023-12-21 10:57:21,237 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 48 treesize of output 35 [2023-12-21 10:57:21,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:57:21,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:57:24,023 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 11 treesize of output 7 [2023-12-21 10:57:25,153 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 19 treesize of output 11 [2023-12-21 10:57:25,174 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 19 treesize of output 11 [2023-12-21 10:57:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 163 proven. 118 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-12-21 10:57:25,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:57:34,106 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 51 treesize of output 43 [2023-12-21 10:57:34,113 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 43 treesize of output 39 [2023-12-21 10:57:34,119 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 39 treesize of output 35 [2023-12-21 10:57:38,209 WARN L854 $PredicateComparison]: unable to prove that (and (or (= (+ (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_29_to_41_0_#in~n.base|) |c_func_to_recursive_line_29_to_41_0_#in~n.offset|) 1) (select (select |c_#memory_int#3| |c_func_to_recursive_line_29_to_41_0_#in~a.base|) |c_func_to_recursive_line_29_to_41_0_#in~a.offset|)) (forall ((|v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_179| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_213| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_124| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_124| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_213| Int) (|v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_167| Int)) (let ((.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_124|) |v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_124|))) (= (+ (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_167|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_179|) 2) 10 (* 6 .cse0)) (let ((.cse1 (select (select |c_#memory_int#5| |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_213|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_213|))) (+ (* .cse1 .cse0) (* .cse1 2))))))) (forall ((|v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_179| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_213| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_124| Int) (|v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_124| Int) (|v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_213| Int) (|v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_167| Int)) (let ((.cse5 (select (select |c_#memory_int#3| |v_func_to_recursive_line_29_to_41_0_#in~a.base_BEFORE_CALL_124|) |v_func_to_recursive_line_29_to_41_0_#in~a.offset_BEFORE_CALL_124|))) (let ((.cse4 (* 6 .cse5))) (or (not (let ((.cse7 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_29_to_41_0_#in~z.base|))) (let ((.cse3 (select .cse7 |c_func_to_recursive_line_29_to_41_0_#in~z.offset|))) (= (+ (* (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_29_to_41_0_#in~y.base| (let ((.cse2 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_29_to_41_0_#in~y.base|))) (store .cse2 |c_func_to_recursive_line_29_to_41_0_#in~y.offset| (+ (select .cse2 |c_func_to_recursive_line_29_to_41_0_#in~y.offset|) (* 2 .cse3) 6)))) |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_167|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_179|) 2) 10 .cse4) (let ((.cse6 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_29_to_41_0_#in~z.base| (store .cse7 |c_func_to_recursive_line_29_to_41_0_#in~z.offset| (+ .cse3 12))) |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_213|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_213|))) (+ (* .cse5 .cse6) (* 2 .cse6))))))) (= (+ (* (select (select |c_#memory_int#2| |v_func_to_recursive_line_29_to_41_0_#in~y.base_BEFORE_CALL_167|) |v_func_to_recursive_line_29_to_41_0_#in~y.offset_BEFORE_CALL_179|) 2) 10 .cse4) (let ((.cse8 (select (select |c_#memory_int#5| |v_func_to_recursive_line_29_to_41_0_#in~z.base_BEFORE_CALL_213|) |v_func_to_recursive_line_29_to_41_0_#in~z.offset_BEFORE_CALL_213|))) (+ (* .cse8 .cse5) (* .cse8 2))))))))) is different from false [2023-12-21 10:57:39,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:57:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973782016] [2023-12-21 10:57:39,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:57:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045454248] [2023-12-21 10:57:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045454248] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:57:39,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:57:39,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-21 10:57:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956626829] [2023-12-21 10:57:39,278 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:57:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 10:57:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:57:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 10:57:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=883, Unknown=2, NotChecked=60, Total=1056 [2023-12-21 10:57:39,279 INFO L87 Difference]: Start difference. First operand 301 states and 330 transitions. Second operand has 24 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 8 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-12-21 10:57:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:57:41,995 INFO L93 Difference]: Finished difference Result 309 states and 336 transitions. [2023-12-21 10:57:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 10:57:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 8 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 162 [2023-12-21 10:57:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:57:42,016 INFO L225 Difference]: With dead ends: 309 [2023-12-21 10:57:42,016 INFO L226 Difference]: Without dead ends: 307 [2023-12-21 10:57:42,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=203, Invalid=1521, Unknown=2, NotChecked=80, Total=1806 [2023-12-21 10:57:42,017 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-21 10:57:42,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 100 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 818 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2023-12-21 10:57:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-21 10:57:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2023-12-21 10:57:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 197 states have (on average 1.0355329949238579) internal successors, (204), 201 states have internal predecessors, (204), 54 states have call successors, (54), 44 states have call predecessors, (54), 53 states have return successors, (75), 59 states have call predecessors, (75), 52 states have call successors, (75) [2023-12-21 10:57:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 333 transitions. [2023-12-21 10:57:42,139 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 333 transitions. Word has length 162 [2023-12-21 10:57:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:57:42,139 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 333 transitions. [2023-12-21 10:57:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 8 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-12-21 10:57:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 333 transitions. [2023-12-21 10:57:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-21 10:57:42,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:57:42,140 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:57:42,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-21 10:57:42,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:57:42,347 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:57:42,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:57:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1951850051, now seen corresponding path program 3 times [2023-12-21 10:57:42,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:57:42,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497971604] [2023-12-21 10:57:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:57:42,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:57:42,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:57:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571604944] [2023-12-21 10:57:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:57:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:57:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:57:42,363 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:57:42,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-21 10:57:42,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:57:42,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:57:42,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 254 conjunts are in the unsatisfiable core [2023-12-21 10:57:42,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:57:42,984 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 [2023-12-21 10:57:42,989 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 [2023-12-21 10:57:42,995 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 [2023-12-21 10:57:42,999 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 [2023-12-21 10:57:44,874 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 19 treesize of output 11 [2023-12-21 10:57:44,882 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 19 treesize of output 11 [2023-12-21 10:57:44,886 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 19 treesize of output 11 [2023-12-21 10:57:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 286 proven. 56 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2023-12-21 10:57:45,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:57:46,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:57:46,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497971604] [2023-12-21 10:57:46,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:57:46,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571604944] [2023-12-21 10:57:46,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571604944] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:57:46,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:57:46,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-21 10:57:46,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338222652] [2023-12-21 10:57:46,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:57:46,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 10:57:46,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:57:46,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 10:57:46,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-12-21 10:57:46,895 INFO L87 Difference]: Start difference. First operand 305 states and 333 transitions. Second operand has 19 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2023-12-21 10:57:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:57:48,728 INFO L93 Difference]: Finished difference Result 313 states and 339 transitions. [2023-12-21 10:57:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:57:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 168 [2023-12-21 10:57:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:57:48,749 INFO L225 Difference]: With dead ends: 313 [2023-12-21 10:57:48,749 INFO L226 Difference]: Without dead ends: 309 [2023-12-21 10:57:48,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:57:48,749 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 27 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:57:48,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 106 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 652 Invalid, 4 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 10:57:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-12-21 10:57:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2023-12-21 10:57:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 199 states have (on average 1.0301507537688441) internal successors, (205), 202 states have internal predecessors, (205), 54 states have call successors, (54), 45 states have call predecessors, (54), 53 states have return successors, (75), 59 states have call predecessors, (75), 52 states have call successors, (75) [2023-12-21 10:57:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 334 transitions. [2023-12-21 10:57:48,887 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 334 transitions. Word has length 168 [2023-12-21 10:57:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:57:48,887 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 334 transitions. [2023-12-21 10:57:48,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 18 states have internal predecessors, (38), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2023-12-21 10:57:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 334 transitions. [2023-12-21 10:57:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-12-21 10:57:48,888 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:57:48,888 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:57:48,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-21 10:57:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-21 10:57:49,096 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:57:49,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:57:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1756071187, now seen corresponding path program 2 times [2023-12-21 10:57:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:57:49,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748447351] [2023-12-21 10:57:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:57:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:57:49,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:57:49,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392377974] [2023-12-21 10:57:49,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:57:49,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:57:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:57:49,113 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:57:49,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-21 10:57:49,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:57:49,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:57:49,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 264 conjunts are in the unsatisfiable core [2023-12-21 10:57:49,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:57:49,463 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 [2023-12-21 10:57:49,468 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 48 treesize of output 35 [2023-12-21 10:57:49,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:57:49,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-21 10:57:49,496 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 [2023-12-21 10:57:52,847 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 40 treesize of output 17 [2023-12-21 10:57:52,850 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 [2023-12-21 10:58:00,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:58:00,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 59 [2023-12-21 10:58:00,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:58:00,405 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 52 treesize of output 56 [2023-12-21 10:58:00,471 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 19 treesize of output 11 [2023-12-21 10:58:03,198 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 32 treesize of output 20 [2023-12-21 10:58:03,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 10:58:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 359 proven. 655 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2023-12-21 10:58:03,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:58:18,618 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 101 treesize of output 85 [2023-12-21 10:58:18,624 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 85 treesize of output 77 [2023-12-21 10:58:27,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:58:27,668 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 130 treesize of output 125 [2023-12-21 10:58:27,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:58:27,692 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 114 treesize of output 117 [2023-12-21 10:58:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:58:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748447351] [2023-12-21 10:58:32,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:58:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392377974] [2023-12-21 10:58:32,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392377974] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:58:32,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:58:32,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-12-21 10:58:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737797815] [2023-12-21 10:58:32,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:58:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 10:58:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:58:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 10:58:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 10:58:32,740 INFO L87 Difference]: Start difference. First operand 307 states and 334 transitions. Second operand has 33 states, 25 states have (on average 2.28) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (25), 6 states have call predecessors, (25), 10 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-21 10:58:52,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:59:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:59:06,399 INFO L93 Difference]: Finished difference Result 311 states and 336 transitions. [2023-12-21 10:59:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 10:59:06,400 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.28) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (25), 6 states have call predecessors, (25), 10 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) Word has length 180 [2023-12-21 10:59:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:59:06,401 INFO L225 Difference]: With dead ends: 311 [2023-12-21 10:59:06,401 INFO L226 Difference]: Without dead ends: 267 [2023-12-21 10:59:06,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 159 SyntacticMatches, 22 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=571, Invalid=3985, Unknown=0, NotChecked=0, Total=4556 [2023-12-21 10:59:06,403 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 55 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:59:06,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 121 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1022 Invalid, 6 Unknown, 0 Unchecked, 12.1s Time] [2023-12-21 10:59:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-12-21 10:59:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2023-12-21 10:59:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 175 states have internal predecessors, (177), 48 states have call successors, (48), 39 states have call predecessors, (48), 44 states have return successors, (66), 50 states have call predecessors, (66), 47 states have call successors, (66) [2023-12-21 10:59:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 291 transitions. [2023-12-21 10:59:06,523 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 291 transitions. Word has length 180 [2023-12-21 10:59:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:59:06,523 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 291 transitions. [2023-12-21 10:59:06,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.28) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (25), 6 states have call predecessors, (25), 10 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-21 10:59:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 291 transitions. [2023-12-21 10:59:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-12-21 10:59:06,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:59:06,524 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:59:06,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-21 10:59:06,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:59:06,732 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:59:06,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:59:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash -185158126, now seen corresponding path program 4 times [2023-12-21 10:59:06,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:59:06,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322420372] [2023-12-21 10:59:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:59:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:59:06,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:59:06,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317984394] [2023-12-21 10:59:06,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:59:06,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:59:06,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:59:06,752 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:59:06,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-21 10:59:07,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:59:07,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:59:07,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-21 10:59:07,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:59:07,445 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 15 treesize of output 1 [2023-12-21 10:59:07,453 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 15 treesize of output 1 [2023-12-21 10:59:07,792 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 23 treesize of output 15 [2023-12-21 10:59:07,794 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 19 treesize of output 11 [2023-12-21 10:59:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 433 proven. 73 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2023-12-21 10:59:07,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:59:08,787 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 68 treesize of output 64 [2023-12-21 10:59:08,796 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 79 treesize of output 71 [2023-12-21 10:59:09,112 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 68 treesize of output 64 [2023-12-21 10:59:09,120 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 79 treesize of output 71 [2023-12-21 10:59:09,366 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 56 treesize of output 52 [2023-12-21 10:59:09,369 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 79 treesize of output 71 [2023-12-21 10:59:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:59:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322420372] [2023-12-21 10:59:09,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:59:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317984394] [2023-12-21 10:59:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317984394] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:59:09,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:59:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-21 10:59:09,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434333990] [2023-12-21 10:59:09,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:59:09,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 10:59:09,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:59:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 10:59:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:59:09,712 INFO L87 Difference]: Start difference. First operand 265 states and 291 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-21 10:59:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:59:10,429 INFO L93 Difference]: Finished difference Result 271 states and 296 transitions. [2023-12-21 10:59:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 10:59:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 186 [2023-12-21 10:59:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:59:10,430 INFO L225 Difference]: With dead ends: 271 [2023-12-21 10:59:10,430 INFO L226 Difference]: Without dead ends: 269 [2023-12-21 10:59:10,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:59:10,432 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:59:10,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 10:59:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-12-21 10:59:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-12-21 10:59:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 178 states have internal predecessors, (180), 48 states have call successors, (48), 40 states have call predecessors, (48), 45 states have return successors, (66), 50 states have call predecessors, (66), 47 states have call successors, (66) [2023-12-21 10:59:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 294 transitions. [2023-12-21 10:59:10,585 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 294 transitions. Word has length 186 [2023-12-21 10:59:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:59:10,585 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 294 transitions. [2023-12-21 10:59:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-21 10:59:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 294 transitions. [2023-12-21 10:59:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-12-21 10:59:10,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:59:10,587 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2023-12-21 10:59:10,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-21 10:59:10,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:59:10,794 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:59:10,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:59:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1438183332, now seen corresponding path program 6 times [2023-12-21 10:59:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:59:10,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570377544] [2023-12-21 10:59:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:59:10,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:59:10,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:59:10,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747937728] [2023-12-21 10:59:10,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 10:59:10,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:59:10,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:59:10,812 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:59:10,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process Received shutdown request... [2023-12-21 10:59:26,055 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 [2023-12-21 10:59:26,057 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 10:59:27,256 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 10:59:27,268 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forcibly destroying the process [2023-12-21 10:59:27,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-21 10:59:27,276 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:59:27,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 137 [2023-12-21 10:59:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-21 10:59:27,280 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-21 10:59:27,283 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:59:27,284 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:59:27,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:59:27 BoogieIcfgContainer [2023-12-21 10:59:27,294 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:59:27,295 INFO L158 Benchmark]: Toolchain (without parser) took 871758.19ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 191.1MB in the beginning and 263.1MB in the end (delta: -72.0MB). Peak memory consumption was 104.0MB. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 173.0MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.40ms. Allocated memory is still 238.0MB. Free memory was 190.7MB in the beginning and 178.9MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.76ms. Allocated memory is still 238.0MB. Free memory was 178.9MB in the beginning and 177.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L158 Benchmark]: Boogie Preprocessor took 36.00ms. Allocated memory is still 238.0MB. Free memory was 177.1MB in the beginning and 174.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L158 Benchmark]: RCFGBuilder took 403.63ms. Allocated memory is still 238.0MB. Free memory was 174.7MB in the beginning and 155.1MB in the end (delta: 19.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L158 Benchmark]: TraceAbstraction took 871085.79ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 154.4MB in the beginning and 263.1MB in the end (delta: -108.7MB). Peak memory consumption was 67.3MB. Max. memory is 8.0GB. [2023-12-21 10:59:27,295 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 173.0MB. Free memory is still 127.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.40ms. Allocated memory is still 238.0MB. Free memory was 190.7MB in the beginning and 178.9MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.76ms. Allocated memory is still 238.0MB. Free memory was 178.9MB in the beginning and 177.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.00ms. Allocated memory is still 238.0MB. Free memory was 177.1MB in the beginning and 174.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 403.63ms. Allocated memory is still 238.0MB. Free memory was 174.7MB in the beginning and 155.1MB in the end (delta: 19.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 871085.79ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 154.4MB in the beginning and 263.1MB in the end (delta: -108.7MB). Peak memory consumption was 67.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 41). Cancelled while NwaCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 871.0s, OverallIterations: 34, TraceHistogramMax: 28, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 458.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 mSolverCounterUnknown, 2459 SdHoareTripleChecker+Valid, 170.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2307 mSDsluCounter, 4609 SdHoareTripleChecker+Invalid, 167.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 33 IncrementalHoareTripleChecker+Unchecked, 3839 mSDsCounter, 1712 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21865 IncrementalHoareTripleChecker+Invalid, 23674 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1712 mSolverCounterUnsat, 770 mSDtfsCounter, 21865 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4444 GetRequests, 3015 SyntacticMatches, 228 SemanticMatches, 1201 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12237 ImplicationChecksByTransitivity, 550.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=307occurred in iteration=31, InterpolantAutomatonStates: 672, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 126 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 379.2s InterpolantComputationTime, 3062 NumberOfCodeBlocks, 2699 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 3546 ConstructedInterpolants, 1511 QuantifiedInterpolants, 102644 SizeOfPredicates, 1152 NumberOfNonLiveVariables, 14108 ConjunctsInSsa, 4227 ConjunctsInUnsatCore, 42 InterpolantComputations, 3 PerfectInterpolantSequences, 12254/16436 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