/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-fpi/eqn4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:49:29,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:49:29,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:49:30,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:49:30,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:49:30,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:49:30,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:49:30,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:49:30,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:49:30,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:49:30,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:49:30,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:49:30,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:49:30,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:49:30,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:49:30,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:49:30,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:49:30,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:49:30,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:49:30,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:49:30,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:49:30,091 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:49:30,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:49:30,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:49:30,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:49:30,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:49:30,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:49:30,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:49:30,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:49:30,094 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:49:30,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:49:30,095 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:49:30,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:49:30,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:49:30,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:49:30,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:49:30,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:49:30,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:49:30,096 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:49:30,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:49:30,097 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:49:30,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:49:30,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:49:30,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:49:30,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:49:30,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:49:30,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:49:30,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:49:30,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:49:30,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:49:30,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:49:30,099 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:49:30,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:49:30,099 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:49:30,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:49:30,100 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:49:30,100 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:49:30,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:49:30,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:49:30,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:49:30,342 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:49:30,342 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:49:30,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2023-04-01 19:49:31,411 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:49:31,608 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:49:31,608 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2023-04-01 19:49:31,614 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0390fe6ee/f973f75240fd4bccb62e882cac7753ad/FLAG7aa028957 [2023-04-01 19:49:31,631 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0390fe6ee/f973f75240fd4bccb62e882cac7753ad [2023-04-01 19:49:31,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:49:31,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:49:31,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:49:31,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:49:31,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:49:31,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3add3068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31, skipping insertion in model container [2023-04-01 19:49:31,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:49:31,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:49:31,793 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c[587,600] [2023-04-01 19:49:31,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:49:31,832 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:49:31,843 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c[587,600] [2023-04-01 19:49:31,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:49:31,860 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:49:31,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31 WrapperNode [2023-04-01 19:49:31,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:49:31,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:49:31,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:49:31,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:49:31,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:49:31,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:49:31,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:49:31,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:49:31,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (1/1) ... [2023-04-01 19:49:31,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:49:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:31,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:49:31,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:49:31,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:49:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:49:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:49:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:49:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:49:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:49:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:49:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:49:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 19:49:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:49:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:49:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:49:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:49:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:49:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:49:32,022 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:49:32,024 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:49:32,216 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:49:32,221 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:49:32,221 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:49:32,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:49:32 BoogieIcfgContainer [2023-04-01 19:49:32,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:49:32,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:49:32,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:49:32,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:49:32,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:49:31" (1/3) ... [2023-04-01 19:49:32,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e6161d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:49:32, skipping insertion in model container [2023-04-01 19:49:32,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:49:31" (2/3) ... [2023-04-01 19:49:32,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e6161d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:49:32, skipping insertion in model container [2023-04-01 19:49:32,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:49:32" (3/3) ... [2023-04-01 19:49:32,242 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn4.c [2023-04-01 19:49:32,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:49:32,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:49:32,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:49:32,300 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=LoopsAndPotentialCycles, 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;@6ebecb91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:49:32,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:49:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:49:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 19:49:32,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:32,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:49:32,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:32,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 199879945, now seen corresponding path program 1 times [2023-04-01 19:49:32,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:32,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504383871] [2023-04-01 19:49:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:32,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:32,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504383871] [2023-04-01 19:49:32,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 19:49:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541433168] [2023-04-01 19:49:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:32,445 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) [2023-04-01 19:49:32,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:49:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:32,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 19:49:32,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:32,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:49:32,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541433168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:49:32,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:49:32,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 19:49:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375718711] [2023-04-01 19:49:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:49:32,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 19:49:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 19:49:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 19:49:32,602 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:32,617 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-04-01 19:49:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 19:49:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 19:49:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:32,623 INFO L225 Difference]: With dead ends: 58 [2023-04-01 19:49:32,623 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 19:49:32,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 19:49:32,628 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:32,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:49:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 19:49:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 19:49:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:49:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 19:49:32,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2023-04-01 19:49:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:32,654 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 19:49:32,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 19:49:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 19:49:32,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:32,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:49:32,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:32,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 19:49:32,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:32,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:32,862 INFO L85 PathProgramCache]: Analyzing trace with hash -386926069, now seen corresponding path program 1 times [2023-04-01 19:49:32,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:32,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001476501] [2023-04-01 19:49:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:32,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:32,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:32,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679065492] [2023-04-01 19:49:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:32,908 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) [2023-04-01 19:49:32,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:49:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:33,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 19:49:33,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:33,131 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 19:49:33,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 19:49:33,147 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:33,165 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:33,267 INFO L350 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 16 treesize of output 5 [2023-04-01 19:49:33,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-04-01 19:49:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:33,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:49:33,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:33,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001476501] [2023-04-01 19:49:33,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:33,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679065492] [2023-04-01 19:49:33,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679065492] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:49:33,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:49:33,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 19:49:33,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514991484] [2023-04-01 19:49:33,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:49:33,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 19:49:33,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 19:49:33,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 19:49:33,356 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:33,513 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-04-01 19:49:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 19:49:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 19:49:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:33,516 INFO L225 Difference]: With dead ends: 47 [2023-04-01 19:49:33,516 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 19:49:33,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:49:33,519 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:33,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 137 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:49:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 19:49:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-04-01 19:49:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:49:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-04-01 19:49:33,539 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2023-04-01 19:49:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:33,540 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-04-01 19:49:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-04-01 19:49:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 19:49:33,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:33,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:49:33,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:33,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 19:49:33,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:33,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1765590153, now seen corresponding path program 1 times [2023-04-01 19:49:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:33,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655446387] [2023-04-01 19:49:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:33,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:33,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:33,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095408574] [2023-04-01 19:49:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:33,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:33,807 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) [2023-04-01 19:49:33,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:49:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:33,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:49:33,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:33,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:49:33,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:33,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655446387] [2023-04-01 19:49:33,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:33,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095408574] [2023-04-01 19:49:33,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095408574] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:49:33,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:49:33,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:49:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593781235] [2023-04-01 19:49:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:49:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:49:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:49:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:49:33,891 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:33,958 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-04-01 19:49:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:49:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 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 24 [2023-04-01 19:49:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:33,961 INFO L225 Difference]: With dead ends: 71 [2023-04-01 19:49:33,961 INFO L226 Difference]: Without dead ends: 58 [2023-04-01 19:49:33,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 19:49:33,962 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:33,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 69 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:49:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-01 19:49:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2023-04-01 19:49:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:49:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-04-01 19:49:33,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2023-04-01 19:49:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:33,970 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-04-01 19:49:33,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-04-01 19:49:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 19:49:33,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:33,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:49:33,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:34,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:34,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:34,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:34,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1858974921, now seen corresponding path program 1 times [2023-04-01 19:49:34,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:34,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775263809] [2023-04-01 19:49:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:34,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:34,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:34,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216117927] [2023-04-01 19:49:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:34,203 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) [2023-04-01 19:49:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:49:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:34,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:49:34,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:34,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:49:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775263809] [2023-04-01 19:49:34,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216117927] [2023-04-01 19:49:34,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216117927] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:49:34,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:49:34,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 19:49:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697879308] [2023-04-01 19:49:34,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:49:34,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 19:49:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 19:49:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:49:34,331 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:34,428 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-04-01 19:49:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 19:49:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 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 24 [2023-04-01 19:49:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:34,434 INFO L225 Difference]: With dead ends: 66 [2023-04-01 19:49:34,434 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 19:49:34,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-01 19:49:34,438 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:34,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 88 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:49:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 19:49:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2023-04-01 19:49:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:49:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-04-01 19:49:34,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-04-01 19:49:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:34,453 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-04-01 19:49:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-04-01 19:49:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 19:49:34,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:34,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:49:34,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:34,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:34,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash -292108345, now seen corresponding path program 1 times [2023-04-01 19:49:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180988037] [2023-04-01 19:49:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:34,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045294084] [2023-04-01 19:49:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:34,703 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) [2023-04-01 19:49:34,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:49:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:34,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 19:49:34,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:34,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-04-01 19:49:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:49:34,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 19:49:34,859 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:34,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 19:49:34,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:49:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:35,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:49:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:35,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:35,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180988037] [2023-04-01 19:49:35,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:35,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045294084] [2023-04-01 19:49:35,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045294084] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:49:35,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:49:35,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-04-01 19:49:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577702085] [2023-04-01 19:49:35,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:49:35,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 19:49:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 19:49:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=255, Unknown=3, NotChecked=0, Total=306 [2023-04-01 19:49:35,287 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 19:49:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:35,669 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-04-01 19:49:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 19:49:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-04-01 19:49:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:35,670 INFO L225 Difference]: With dead ends: 72 [2023-04-01 19:49:35,671 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 19:49:35,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=455, Unknown=4, NotChecked=0, Total=552 [2023-04-01 19:49:35,672 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:35,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 221 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:49:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 19:49:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2023-04-01 19:49:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:49:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-04-01 19:49:35,687 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 26 [2023-04-01 19:49:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:35,688 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-04-01 19:49:35,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 19:49:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-04-01 19:49:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 19:49:35,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:35,689 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-04-01 19:49:35,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:35,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:35,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:35,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash -781361951, now seen corresponding path program 1 times [2023-04-01 19:49:35,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:35,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999225132] [2023-04-01 19:49:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:35,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:35,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458190291] [2023-04-01 19:49:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:35,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:35,913 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) [2023-04-01 19:49:35,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:49:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:36,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 19:49:36,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:36,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:49:36,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999225132] [2023-04-01 19:49:36,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458190291] [2023-04-01 19:49:36,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458190291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:49:36,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:49:36,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 19:49:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297759744] [2023-04-01 19:49:36,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:49:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 19:49:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 19:49:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:49:36,063 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:49:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:36,134 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2023-04-01 19:49:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 19:49:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-04-01 19:49:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:36,137 INFO L225 Difference]: With dead ends: 69 [2023-04-01 19:49:36,137 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 19:49:36,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-04-01 19:49:36,142 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:36,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:49:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 19:49:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-04-01 19:49:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:49:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-04-01 19:49:36,158 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 30 [2023-04-01 19:49:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:36,158 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-04-01 19:49:36,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:49:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-04-01 19:49:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 19:49:36,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:36,159 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-04-01 19:49:36,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:36,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:36,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:36,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:36,372 INFO L85 PathProgramCache]: Analyzing trace with hash 525498179, now seen corresponding path program 2 times [2023-04-01 19:49:36,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:36,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314546048] [2023-04-01 19:49:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:36,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:36,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:36,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46126203] [2023-04-01 19:49:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:49:36,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:36,429 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) [2023-04-01 19:49:36,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:49:36,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:49:36,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:49:36,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 19:49:36,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:36,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:49:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:36,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:36,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314546048] [2023-04-01 19:49:36,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:36,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46126203] [2023-04-01 19:49:36,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46126203] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:49:36,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:49:36,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 19:49:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441201058] [2023-04-01 19:49:36,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:49:36,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 19:49:36,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 19:49:36,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-04-01 19:49:36,630 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:36,912 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-04-01 19:49:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 19:49:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 2 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 30 [2023-04-01 19:49:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:36,913 INFO L225 Difference]: With dead ends: 126 [2023-04-01 19:49:36,914 INFO L226 Difference]: Without dead ends: 99 [2023-04-01 19:49:36,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:49:36,915 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:36,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 166 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:49:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-01 19:49:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2023-04-01 19:49:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 57 states have internal predecessors, (64), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:49:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-04-01 19:49:36,936 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 30 [2023-04-01 19:49:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:36,936 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-04-01 19:49:36,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:49:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-04-01 19:49:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:49:36,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:36,941 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-04-01 19:49:36,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:37,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:37,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2143768931, now seen corresponding path program 1 times [2023-04-01 19:49:37,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:37,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097623435] [2023-04-01 19:49:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:37,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:37,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897444560] [2023-04-01 19:49:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:37,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:37,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:37,174 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) [2023-04-01 19:49:37,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:49:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:49:37,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 19:49:37,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:37,360 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-04-01 19:49:37,361 INFO L350 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-04-01 19:49:37,385 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-04-01 19:49:37,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2023-04-01 19:49:37,394 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:37,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 19:49:37,427 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:37,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2023-04-01 19:49:37,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 11 [2023-04-01 19:49:37,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-04-01 19:49:37,527 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 19:49:37,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:49:37,595 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 19:49:37,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:49:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:37,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:49:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:38,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:49:38,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097623435] [2023-04-01 19:49:38,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:49:38,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897444560] [2023-04-01 19:49:38,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897444560] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:49:38,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:49:38,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-04-01 19:49:38,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681452378] [2023-04-01 19:49:38,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:49:38,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 19:49:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:49:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 19:49:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-04-01 19:49:38,419 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:49:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:49:39,296 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2023-04-01 19:49:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 19:49:39,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2023-04-01 19:49:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:49:39,298 INFO L225 Difference]: With dead ends: 115 [2023-04-01 19:49:39,298 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 19:49:39,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:49:39,299 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:49:39,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 312 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 19:49:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 19:49:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2023-04-01 19:49:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 60 states have internal predecessors, (65), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 19:49:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2023-04-01 19:49:39,316 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 34 [2023-04-01 19:49:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:49:39,316 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2023-04-01 19:49:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 19:49:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2023-04-01 19:49:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:49:39,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:49:39,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:49:39,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 19:49:39,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 19:49:39,525 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:49:39,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:49:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2094692671, now seen corresponding path program 3 times [2023-04-01 19:49:39,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:49:39,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919523882] [2023-04-01 19:49:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:49:39,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:49:39,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:49:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078315039] [2023-04-01 19:49:39,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:49:39,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:49:39,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:49:39,560 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) [2023-04-01 19:49:39,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:49:39,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 19:49:39,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:49:39,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-01 19:49:39,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:49:40,055 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 19:49:40,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 19:49:40,064 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:40,070 INFO L350 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 8 treesize of output 7 [2023-04-01 19:49:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:49:40,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2023-04-01 19:49:40,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-04-01 19:49:40,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 19:49:40,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 19:49:40,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 19:49:40,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:49:40,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:49:40,436 INFO L350 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 53 treesize of output 46 [2023-04-01 19:49:40,444 INFO L321 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-04-01 19:49:40,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 85 [2023-04-01 19:49:40,476 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-04-01 19:49:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 28 [2023-04-01 19:49:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:49:40,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:49:42,617 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| c_main_~b~0.base))) (and (forall ((v_z_3 Int) (v_y_3 Int) (v_ArrVal_300 Int)) (let ((.cse0 (* v_y_3 4294967296))) (or (< (+ v_z_3 .cse0 1) c_~N~0) (< v_z_3 0) (<= c_~N~0 (+ v_z_3 .cse0)) (< 2147483647 v_z_3) (= (select (store .cse1 (+ (* v_z_3 8) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1)))) (forall ((v_ArrVal_300 Int) (v_z_1 Int) (v_y_1 Int)) (let ((.cse2 (* v_y_1 4294967296))) (or (<= c_~N~0 (+ v_z_1 .cse2)) (<= v_z_1 2147483647) (< (+ v_z_1 .cse2 1) c_~N~0) (= (select (store .cse1 (+ (* v_z_1 8) (- 34359738368) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (<= 4294967296 v_z_1)))))) is different from false [2023-04-01 19:49:44,763 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~i~0 4294967296))) (let ((.cse2 (select |c_#memory_int| c_main_~b~0.base)) (.cse5 (* .cse0 8))) (and (or (< 2147483647 .cse0) (let ((.cse3 (+ .cse5 c_main_~b~0.offset))) (and (forall ((v_ArrVal_300 Int) (v_ArrVal_298 Int) (v_z_1 Int) (v_y_1 Int)) (let ((.cse1 (* v_y_1 4294967296))) (or (<= c_~N~0 (+ v_z_1 .cse1)) (<= v_z_1 2147483647) (< (+ v_z_1 .cse1 1) c_~N~0) (= (select (store (store .cse2 .cse3 v_ArrVal_298) (+ (* v_z_1 8) (- 34359738368) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (<= 4294967296 v_z_1)))) (forall ((v_z_3 Int) (v_y_3 Int) (v_ArrVal_300 Int) (v_ArrVal_298 Int)) (let ((.cse4 (* v_y_3 4294967296))) (or (< (+ v_z_3 .cse4 1) c_~N~0) (< v_z_3 0) (<= c_~N~0 (+ v_z_3 .cse4)) (= (select (store (store .cse2 .cse3 v_ArrVal_298) (+ (* v_z_3 8) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (< 2147483647 v_z_3))))))) (or (let ((.cse7 (+ .cse5 (- 34359738368) c_main_~b~0.offset))) (and (forall ((v_z_3 Int) (v_y_3 Int) (v_ArrVal_300 Int) (v_ArrVal_298 Int)) (let ((.cse6 (* v_y_3 4294967296))) (or (< (+ v_z_3 .cse6 1) c_~N~0) (< v_z_3 0) (<= c_~N~0 (+ v_z_3 .cse6)) (< 2147483647 v_z_3) (= (select (store (store .cse2 .cse7 v_ArrVal_298) (+ (* v_z_3 8) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1)))) (forall ((v_ArrVal_300 Int) (v_ArrVal_298 Int) (v_z_1 Int) (v_y_1 Int)) (let ((.cse8 (* v_y_1 4294967296))) (or (<= c_~N~0 (+ v_z_1 .cse8)) (= (select (store (store .cse2 .cse7 v_ArrVal_298) (+ (* v_z_1 8) (- 34359738368) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (<= v_z_1 2147483647) (< (+ v_z_1 .cse8 1) c_~N~0) (<= 4294967296 v_z_1)))))) (<= .cse0 2147483647))))) is different from false [2023-04-01 19:49:46,682 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (mod (+ c_main_~i~0 1) 4294967296))) (let ((.cse1 (select |c_#memory_int| c_main_~b~0.base)) (.cse4 (* .cse5 8))) (and (or (let ((.cse2 (+ .cse4 c_main_~b~0.offset))) (and (forall ((v_ArrVal_300 Int) (v_ArrVal_298 Int) (v_z_1 Int) (v_y_1 Int)) (let ((.cse0 (* v_y_1 4294967296))) (or (<= c_~N~0 (+ v_z_1 .cse0)) (<= v_z_1 2147483647) (< (+ v_z_1 .cse0 1) c_~N~0) (<= 4294967296 v_z_1) (= (select (store (store .cse1 .cse2 v_ArrVal_298) (+ (* v_z_1 8) (- 34359738368) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1)))) (forall ((v_z_3 Int) (v_y_3 Int) (v_ArrVal_300 Int) (v_ArrVal_298 Int)) (let ((.cse3 (* v_y_3 4294967296))) (or (< (+ v_z_3 .cse3 1) c_~N~0) (= (select (store (store .cse1 .cse2 v_ArrVal_298) (+ (* v_z_3 8) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (< v_z_3 0) (<= c_~N~0 (+ v_z_3 .cse3)) (< 2147483647 v_z_3)))))) (< 2147483647 .cse5)) (or (let ((.cse7 (+ .cse4 (- 34359738368) c_main_~b~0.offset))) (and (forall ((v_z_3 Int) (v_y_3 Int) (v_ArrVal_300 Int) (v_ArrVal_298 Int)) (let ((.cse6 (* v_y_3 4294967296))) (or (< (+ v_z_3 .cse6 1) c_~N~0) (< v_z_3 0) (<= c_~N~0 (+ v_z_3 .cse6)) (= (select (store (store .cse1 .cse7 v_ArrVal_298) (+ (* v_z_3 8) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (< 2147483647 v_z_3)))) (forall ((v_ArrVal_300 Int) (v_ArrVal_298 Int) (v_z_1 Int) (v_y_1 Int)) (let ((.cse8 (* v_y_1 4294967296))) (or (<= c_~N~0 (+ v_z_1 .cse8)) (<= v_z_1 2147483647) (< (+ v_z_1 .cse8 1) c_~N~0) (= (select (store (store .cse1 .cse7 v_ArrVal_298) (+ (* v_z_1 8) (- 34359738368) c_main_~b~0.offset) v_ArrVal_300) c_main_~b~0.offset) 1) (<= 4294967296 v_z_1)))))) (<= .cse5 2147483647))))) is different from false [2023-04-01 19:50:00,715 WARN L223 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 111 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:50:08,214 WARN L223 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:50:26,444 WARN L223 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:50:26,556 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:50:26,559 INFO L350 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 89 treesize of output 85 [2023-04-01 19:50:26,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:50:26,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:50:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-04-01 19:50:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:50:26,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919523882] [2023-04-01 19:50:26,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:50:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078315039] [2023-04-01 19:50:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078315039] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:50:26,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:50:26,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2023-04-01 19:50:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432791530] [2023-04-01 19:50:26,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:50:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 19:50:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:50:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 19:50:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=987, Unknown=4, NotChecked=204, Total=1406 [2023-04-01 19:50:26,618 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 38 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:50:45,098 WARN L223 SmtUtils]: Spent 16.96s on a formula simplification. DAG size of input: 91 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:51:01,227 WARN L223 SmtUtils]: Spent 15.77s on a formula simplification. DAG size of input: 103 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:51:24,121 WARN L223 SmtUtils]: Spent 20.81s on a formula simplification. DAG size of input: 111 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:51:38,354 WARN L223 SmtUtils]: Spent 14.09s on a formula simplification. DAG size of input: 93 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:51:55,104 WARN L223 SmtUtils]: Spent 12.86s on a formula simplification. DAG size of input: 86 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:52:14,735 WARN L223 SmtUtils]: Spent 19.32s on a formula simplification. DAG size of input: 111 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:52:27,240 WARN L223 SmtUtils]: Spent 12.40s on a formula simplification. DAG size of input: 90 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:52:34,966 WARN L223 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 82 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:52:38,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 19:53:25,489 WARN L223 SmtUtils]: Spent 27.45s on a formula simplification. DAG size of input: 115 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:53:37,857 WARN L223 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 92 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:53:43,948 WARN L223 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 133 DAG size of output: 17 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:53:45,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]