/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-crafted/zero_sum1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:15:21,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:15:21,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:15:21,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:15:21,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:15:21,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:15:21,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:15:21,203 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 19:15:21,215 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:15:21,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:15:21,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:15:21,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:15:21,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:15:21,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:15:21,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:15:21,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:15:21,217 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:15:21,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:15:21,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:15:21,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:15:21,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:15:21,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:15:21,220 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:15:21,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:15:21,221 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:15:21,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:15:21,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:15:21,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:15:21,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:15:21,444 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:15:21,445 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:15:21,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum1.c [2023-04-01 19:15:22,518 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:15:22,632 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:15:22,632 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum1.c [2023-04-01 19:15:22,636 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1c39703/0d38f33e7acb4b7ea6f5d1f7611d3517/FLAG9985e0542 [2023-04-01 19:15:22,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1c39703/0d38f33e7acb4b7ea6f5d1f7611d3517 [2023-04-01 19:15:22,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:15:22,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:15:22,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:15:22,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:15:22,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:15:22,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ab5e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22, skipping insertion in model container [2023-04-01 19:15:22,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:15:22,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:15:22,787 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-crafted/zero_sum1.c[400,413] [2023-04-01 19:15:22,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:15:22,810 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:15:22,818 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-crafted/zero_sum1.c[400,413] [2023-04-01 19:15:22,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:15:22,838 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:15:22,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22 WrapperNode [2023-04-01 19:15:22,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:15:22,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:15:22,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:15:22,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:15:22,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:15:22,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:15:22,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:15:22,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:15:22,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (1/1) ... [2023-04-01 19:15:22,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:15:22,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:22,909 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 19:15:22,917 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 19:15:22,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:15:22,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:15:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:15:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:15:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:15:22,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:15:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:15:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:15:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:15:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:15:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:15:23,014 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:15:23,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:15:23,142 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:15:23,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:15:23,147 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:15:23,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:15:23 BoogieIcfgContainer [2023-04-01 19:15:23,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:15:23,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:15:23,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:15:23,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:15:23,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:15:22" (1/3) ... [2023-04-01 19:15:23,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:15:23, skipping insertion in model container [2023-04-01 19:15:23,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:15:22" (2/3) ... [2023-04-01 19:15:23,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:15:23, skipping insertion in model container [2023-04-01 19:15:23,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:15:23" (3/3) ... [2023-04-01 19:15:23,153 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2023-04-01 19:15:23,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:15:23,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:15:23,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:15:23,206 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;@26dd76b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:15:23,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:15:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:15:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 19:15:23,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:23,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:23,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:23,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1585771336, now seen corresponding path program 1 times [2023-04-01 19:15:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:23,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972791441] [2023-04-01 19:15:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:23,441 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 19:15:23,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:23,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972791441] [2023-04-01 19:15:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972791441] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:15:23,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:15:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:15:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227661409] [2023-04-01 19:15:23,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:15:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:15:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:15:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:15:23,489 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:23,590 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-04-01 19:15:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:15:23,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 19:15:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:23,596 INFO L225 Difference]: With dead ends: 49 [2023-04-01 19:15:23,596 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 19:15:23,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:15:23,601 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:23,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 19:15:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-04-01 19:15:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 19:15:23,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2023-04-01 19:15:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 19:15:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 19:15:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 19:15:23,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:23,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:23,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:15:23,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:23,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:23,637 INFO L85 PathProgramCache]: Analyzing trace with hash -42717472, now seen corresponding path program 1 times [2023-04-01 19:15:23,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:23,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024880263] [2023-04-01 19:15:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:23,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:15:23,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024880263] [2023-04-01 19:15:23,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024880263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:15:23,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:15:23,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:15:23,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358636784] [2023-04-01 19:15:23,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:15:23,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:15:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:15:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:15:23,759 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:23,803 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-04-01 19:15:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:15:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 19:15:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:23,804 INFO L225 Difference]: With dead ends: 33 [2023-04-01 19:15:23,804 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 19:15:23,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:15:23,806 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:23,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:15:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 19:15:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-04-01 19:15:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 19:15:23,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-04-01 19:15:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:23,811 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 19:15:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 19:15:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 19:15:23,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:23,811 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 19:15:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:15:23,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:23,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 394510556, now seen corresponding path program 1 times [2023-04-01 19:15:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:23,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190151945] [2023-04-01 19:15:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:23,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:15:23,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:23,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190151945] [2023-04-01 19:15:23,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190151945] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:23,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072291161] [2023-04-01 19:15:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:23,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:23,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:23,919 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 19:15:23,933 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 19:15:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:24,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:15:24,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:15:24,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:15:24,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072291161] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:24,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:24,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:15:24,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133466028] [2023-04-01 19:15:24,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:24,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:15:24,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:15:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:15:24,125 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:24,164 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-04-01 19:15:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:15:24,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 19:15:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:24,166 INFO L225 Difference]: With dead ends: 39 [2023-04-01 19:15:24,166 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 19:15:24,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:15:24,168 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:24,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:15:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 19:15:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-04-01 19:15:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 19:15:24,175 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2023-04-01 19:15:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:24,175 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 19:15:24,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 19:15:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 19:15:24,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:24,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:24,182 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 19:15:24,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:24,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:24,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:24,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2095717114, now seen corresponding path program 2 times [2023-04-01 19:15:24,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:24,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962208702] [2023-04-01 19:15:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:24,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:15:24,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:24,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962208702] [2023-04-01 19:15:24,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962208702] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:24,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004096992] [2023-04-01 19:15:24,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:15:24,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:24,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:24,464 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 19:15:24,506 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 19:15:24,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:15:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:24,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:15:24,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:15:24,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:15:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004096992] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:24,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-04-01 19:15:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555276210] [2023-04-01 19:15:24,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:24,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 19:15:24,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 19:15:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 19:15:24,604 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:24,652 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-01 19:15:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 19:15:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 19:15:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:24,653 INFO L225 Difference]: With dead ends: 40 [2023-04-01 19:15:24,653 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 19:15:24,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-01 19:15:24,654 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:24,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:15:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 19:15:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 19:15:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 19:15:24,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2023-04-01 19:15:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:24,658 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 19:15:24,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 19:15:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 19:15:24,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:24,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:24,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 19:15:24,863 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,SelfDestructingSolverStorable3 [2023-04-01 19:15:24,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:24,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1290338314, now seen corresponding path program 3 times [2023-04-01 19:15:24,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:24,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062523173] [2023-04-01 19:15:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:25,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:25,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062523173] [2023-04-01 19:15:25,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062523173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228374245] [2023-04-01 19:15:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:15:25,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:25,653 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 19:15:25,655 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 19:15:25,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:15:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:25,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 19:15:25,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:26,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:15:26,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:15:26,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-04-01 19:15:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:26,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:26,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:15:26,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 50 [2023-04-01 19:15:26,603 INFO L321 Elim1Store]: treesize reduction 32, result has 22.0 percent of original size [2023-04-01 19:15:26,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 17 [2023-04-01 19:15:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:26,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228374245] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:26,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:26,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 41 [2023-04-01 19:15:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524645754] [2023-04-01 19:15:26,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:26,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:15:26,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:15:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:15:26,872 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:27,618 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-04-01 19:15:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 19:15:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 19:15:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:27,619 INFO L225 Difference]: With dead ends: 55 [2023-04-01 19:15:27,619 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 19:15:27,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 19:15:27,621 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:27,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 104 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:15:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 19:15:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2023-04-01 19:15:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-04-01 19:15:27,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2023-04-01 19:15:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:27,626 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-04-01 19:15:27,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:27,626 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-04-01 19:15:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 19:15:27,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:27,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:27,639 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 19:15:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:27,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:27,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2080752876, now seen corresponding path program 4 times [2023-04-01 19:15:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:27,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144265636] [2023-04-01 19:15:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:27,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:27,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:15:27,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:27,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144265636] [2023-04-01 19:15:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144265636] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164892314] [2023-04-01 19:15:27,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:15:27,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:27,909 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 19:15:27,911 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 19:15:27,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:15:27,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:27,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:15:27,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:15:28,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:15:28,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164892314] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:28,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:28,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-04-01 19:15:28,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692612647] [2023-04-01 19:15:28,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:28,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 19:15:28,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 19:15:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-04-01 19:15:28,053 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:28,221 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-04-01 19:15:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 19:15:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 19:15:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:28,222 INFO L225 Difference]: With dead ends: 74 [2023-04-01 19:15:28,222 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 19:15:28,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:15:28,223 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:28,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 56 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 19:15:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-04-01 19:15:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 19:15:28,227 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2023-04-01 19:15:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:28,228 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 19:15:28,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 19:15:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:15:28,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:28,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:28,240 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 19:15:28,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:28,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:28,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2004973426, now seen corresponding path program 5 times [2023-04-01 19:15:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214179067] [2023-04-01 19:15:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:28,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:28,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214179067] [2023-04-01 19:15:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214179067] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745091929] [2023-04-01 19:15:28,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:15:28,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:28,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:28,524 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 19:15:28,525 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 19:15:28,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-01 19:15:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:28,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:15:28,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:28,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:28,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745091929] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:28,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:28,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-04-01 19:15:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429479432] [2023-04-01 19:15:28,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:28,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 19:15:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 19:15:28,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-04-01 19:15:28,711 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:28,856 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-04-01 19:15:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 19:15:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 19:15:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:28,857 INFO L225 Difference]: With dead ends: 42 [2023-04-01 19:15:28,857 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:15:28,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:15:28,858 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:28,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 59 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:15:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-04-01 19:15:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-04-01 19:15:28,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2023-04-01 19:15:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:28,863 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-04-01 19:15:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-04-01 19:15:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:15:28,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:28,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:28,877 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 19:15:29,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:29,069 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:29,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -677067888, now seen corresponding path program 6 times [2023-04-01 19:15:29,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:29,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664769097] [2023-04-01 19:15:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:29,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:29,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:29,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664769097] [2023-04-01 19:15:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664769097] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50996730] [2023-04-01 19:15:29,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:15:29,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:29,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:29,833 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 19:15:29,833 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 19:15:29,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-01 19:15:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:29,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 19:15:29,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:30,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:30,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:15:30,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-04-01 19:15:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:30,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50996730] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:30,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:30,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 16] total 46 [2023-04-01 19:15:30,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473001715] [2023-04-01 19:15:30,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 19:15:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 19:15:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1919, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 19:15:30,703 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:31,391 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2023-04-01 19:15:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:15:31,391 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-04-01 19:15:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:31,392 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:15:31,392 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 19:15:31,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=2953, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 19:15:31,393 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:31,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 163 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:15:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 19:15:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2023-04-01 19:15:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-04-01 19:15:31,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 34 [2023-04-01 19:15:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:31,398 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-04-01 19:15:31,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 43 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-04-01 19:15:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 19:15:31,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:31,399 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:31,415 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 19:15:31,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:31,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:31,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1138393042, now seen corresponding path program 7 times [2023-04-01 19:15:31,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:31,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96344471] [2023-04-01 19:15:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:31,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96344471] [2023-04-01 19:15:31,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96344471] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:31,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064097184] [2023-04-01 19:15:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:15:31,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:31,694 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 19:15:31,696 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 19:15:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:31,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 19:15:31,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:31,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:31,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064097184] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:31,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:31,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-04-01 19:15:31,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176716930] [2023-04-01 19:15:31,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:31,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 19:15:31,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:31,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 19:15:31,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:15:31,885 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:32,007 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-04-01 19:15:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:15:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-04-01 19:15:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:32,007 INFO L225 Difference]: With dead ends: 74 [2023-04-01 19:15:32,008 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 19:15:32,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:15:32,008 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:32,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 19:15:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-04-01 19:15:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-04-01 19:15:32,013 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2023-04-01 19:15:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:32,013 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-04-01 19:15:32,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-04-01 19:15:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 19:15:32,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:32,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:32,019 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 19:15:32,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:32,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:32,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1646054860, now seen corresponding path program 8 times [2023-04-01 19:15:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309127358] [2023-04-01 19:15:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:32,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:32,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309127358] [2023-04-01 19:15:32,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309127358] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:32,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716564513] [2023-04-01 19:15:32,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:15:32,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:32,319 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 19:15:32,321 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 19:15:32,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:15:32,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:32,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 19:15:32,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:32,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716564513] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:32,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:32,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-04-01 19:15:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063681729] [2023-04-01 19:15:32,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:32,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 19:15:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 19:15:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:15:32,513 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:32,633 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-04-01 19:15:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 19:15:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-01 19:15:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:32,634 INFO L225 Difference]: With dead ends: 58 [2023-04-01 19:15:32,634 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 19:15:32,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:15:32,635 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:32,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 41 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 19:15:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-04-01 19:15:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-04-01 19:15:32,640 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2023-04-01 19:15:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:32,640 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-04-01 19:15:32,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-04-01 19:15:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 19:15:32,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:32,641 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:32,646 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 19:15:32,843 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,SelfDestructingSolverStorable9 [2023-04-01 19:15:32,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:32,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 862956458, now seen corresponding path program 9 times [2023-04-01 19:15:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:32,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45530174] [2023-04-01 19:15:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:33,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45530174] [2023-04-01 19:15:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45530174] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466546735] [2023-04-01 19:15:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:15:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:33,766 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 19:15:33,781 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 19:15:33,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 19:15:33,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:33,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 19:15:33,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:33,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:15:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:15:34,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:15:34,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-04-01 19:15:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:34,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:37,352 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 154 treesize of output 138 [2023-04-01 19:15:37,446 INFO L321 Elim1Store]: treesize reduction 36, result has 64.4 percent of original size [2023-04-01 19:15:37,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 910 treesize of output 639 [2023-04-01 19:15:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:15:37,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466546735] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:37,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:37,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 73 [2023-04-01 19:15:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289329635] [2023-04-01 19:15:37,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:37,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-04-01 19:15:37,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-04-01 19:15:37,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=4818, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 19:15:37,889 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 73 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 70 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:43,089 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2023-04-01 19:15:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 19:15:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 70 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-04-01 19:15:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:43,092 INFO L225 Difference]: With dead ends: 64 [2023-04-01 19:15:43,092 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 19:15:43,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=896, Invalid=9816, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 19:15:43,095 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:43,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 159 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 19:15:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 19:15:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2023-04-01 19:15:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-04-01 19:15:43,120 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2023-04-01 19:15:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:43,120 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-04-01 19:15:43,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 70 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-04-01 19:15:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 19:15:43,122 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:43,122 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:43,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 19:15:43,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:43,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:43,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1356253640, now seen corresponding path program 10 times [2023-04-01 19:15:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:43,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901302962] [2023-04-01 19:15:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:43,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:43,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:43,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:43,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901302962] [2023-04-01 19:15:43,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901302962] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:43,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893606818] [2023-04-01 19:15:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:15:43,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:43,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:43,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:43,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:15:43,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:15:43,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:43,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:15:43,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:43,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:43,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893606818] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:43,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:43,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2023-04-01 19:15:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018135520] [2023-04-01 19:15:43,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:43,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 19:15:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 19:15:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:15:43,731 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:43,931 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2023-04-01 19:15:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 19:15:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 19:15:43,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:43,932 INFO L225 Difference]: With dead ends: 102 [2023-04-01 19:15:43,932 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 19:15:43,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 19:15:43,933 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:43,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 63 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 19:15:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2023-04-01 19:15:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-04-01 19:15:43,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2023-04-01 19:15:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:43,941 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-04-01 19:15:43,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-04-01 19:15:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 19:15:43,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:43,941 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:43,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:15:44,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 19:15:44,146 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:44,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash -232478426, now seen corresponding path program 11 times [2023-04-01 19:15:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985833323] [2023-04-01 19:15:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:44,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:15:44,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:44,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985833323] [2023-04-01 19:15:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985833323] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:44,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658248281] [2023-04-01 19:15:44,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:15:44,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:44,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:44,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:44,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:15:44,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 19:15:44,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:44,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:15:44,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:15:44,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:15:44,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658248281] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:44,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:44,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2023-04-01 19:15:44,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721362179] [2023-04-01 19:15:44,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:44,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 19:15:44,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 19:15:44,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:15:44,564 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:44,754 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-04-01 19:15:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 19:15:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-04-01 19:15:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:44,755 INFO L225 Difference]: With dead ends: 54 [2023-04-01 19:15:44,755 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 19:15:44,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 69 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 19:15:44,756 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:44,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 69 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 19:15:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-04-01 19:15:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-04-01 19:15:44,764 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2023-04-01 19:15:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:44,764 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-04-01 19:15:44,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-04-01 19:15:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 19:15:44,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:44,765 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:44,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:15:44,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:15:44,969 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:44,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash 910317636, now seen corresponding path program 12 times [2023-04-01 19:15:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:44,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704334338] [2023-04-01 19:15:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:46,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704334338] [2023-04-01 19:15:46,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704334338] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527623680] [2023-04-01 19:15:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:15:46,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:46,367 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:46,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:15:46,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-01 19:15:46,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:46,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 65 conjunts are in the unsatisfiable core [2023-04-01 19:15:46,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:46,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:15:47,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:15:47,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-04-01 19:15:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:15:47,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:15:52,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527623680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:52,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:52,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 28] total 83 [2023-04-01 19:15:52,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559045328] [2023-04-01 19:15:52,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:52,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-04-01 19:15:52,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-04-01 19:15:52,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=6428, Unknown=0, NotChecked=0, Total=6806 [2023-04-01 19:15:52,161 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 80 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:55,623 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2023-04-01 19:15:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 19:15:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 80 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-01 19:15:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:55,624 INFO L225 Difference]: With dead ends: 69 [2023-04-01 19:15:55,624 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 19:15:55,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=839, Invalid=13441, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 19:15:55,628 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:55,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 192 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 19:15:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 19:15:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2023-04-01 19:15:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-04-01 19:15:55,662 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2023-04-01 19:15:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:55,663 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-04-01 19:15:55,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 80 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-04-01 19:15:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:15:55,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:55,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:55,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 19:15:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 19:15:55,871 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:55,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash -374294558, now seen corresponding path program 13 times [2023-04-01 19:15:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882176813] [2023-04-01 19:15:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:15:55,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:55,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882176813] [2023-04-01 19:15:55,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882176813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:55,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463469931] [2023-04-01 19:15:55,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:15:55,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:55,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:56,000 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:56,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:15:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:56,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 19:15:56,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:15:56,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:15:56,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463469931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:56,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-04-01 19:15:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206357008] [2023-04-01 19:15:56,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:56,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 19:15:56,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 19:15:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:15:56,264 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:56,457 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2023-04-01 19:15:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 19:15:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-01 19:15:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:56,458 INFO L225 Difference]: With dead ends: 98 [2023-04-01 19:15:56,458 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 19:15:56,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2023-04-01 19:15:56,459 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:56,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 60 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 19:15:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-04-01 19:15:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-04-01 19:15:56,469 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2023-04-01 19:15:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:56,469 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-04-01 19:15:56,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-04-01 19:15:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 19:15:56,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:56,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:56,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-01 19:15:56,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 19:15:56,674 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:56,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash -218462080, now seen corresponding path program 14 times [2023-04-01 19:15:56,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:56,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579927867] [2023-04-01 19:15:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:56,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:56,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:15:56,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:56,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579927867] [2023-04-01 19:15:56,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579927867] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:56,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963370103] [2023-04-01 19:15:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:15:56,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:56,806 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:56,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 19:15:56,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:15:56,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:56,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 19:15:56,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:15:56,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:15:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963370103] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:57,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-04-01 19:15:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022474167] [2023-04-01 19:15:57,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:57,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 19:15:57,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 19:15:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:15:57,068 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:57,234 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2023-04-01 19:15:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 19:15:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 19:15:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:57,235 INFO L225 Difference]: With dead ends: 74 [2023-04-01 19:15:57,235 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 19:15:57,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:15:57,236 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:57,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 45 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 19:15:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-04-01 19:15:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-04-01 19:15:57,246 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2023-04-01 19:15:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:57,246 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-04-01 19:15:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:15:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-04-01 19:15:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 19:15:57,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:57,246 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:57,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-04-01 19:15:57,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:57,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:57,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1265592670, now seen corresponding path program 15 times [2023-04-01 19:15:57,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:57,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268764565] [2023-04-01 19:15:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:59,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:15:59,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:59,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268764565] [2023-04-01 19:15:59,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268764565] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:59,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459971331] [2023-04-01 19:15:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:15:59,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:59,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:59,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 19:15:59,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 19:15:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:59,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-01 19:15:59,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:16:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:01,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:16:01,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-04-01 19:16:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:16:01,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:16:07,616 INFO L321 Elim1Store]: treesize reduction 234, result has 52.0 percent of original size [2023-04-01 19:16:07,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 111 treesize of output 270 [2023-04-01 19:16:08,078 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-04-01 19:16:08,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 23 [2023-04-01 19:16:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:16:08,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459971331] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:16:08,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:16:08,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 33, 32] total 96 [2023-04-01 19:16:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211130377] [2023-04-01 19:16:08,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:16:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-04-01 19:16:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:16:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-04-01 19:16:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=8594, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 19:16:08,339 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 93 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:16:17,610 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2023-04-01 19:16:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 19:16:17,611 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 93 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-01 19:16:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:16:17,611 INFO L225 Difference]: With dead ends: 77 [2023-04-01 19:16:17,611 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 19:16:17,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3899 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1193, Invalid=18547, Unknown=0, NotChecked=0, Total=19740 [2023-04-01 19:16:17,613 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 19:16:17,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 236 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 19:16:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 19:16:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2023-04-01 19:16:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-04-01 19:16:17,627 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2023-04-01 19:16:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:16:17,627 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-04-01 19:16:17,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 93 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-04-01 19:16:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:16:17,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:16:17,628 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:16:17,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-01 19:16:17,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 19:16:17,833 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:16:17,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:16:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1742596732, now seen corresponding path program 16 times [2023-04-01 19:16:17,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:16:17,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610795027] [2023-04-01 19:16:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:16:17,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:16:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:17,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:16:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:16:17,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:16:17,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610795027] [2023-04-01 19:16:17,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610795027] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:16:17,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760002957] [2023-04-01 19:16:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:16:17,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:16:17,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:16:18,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 19:16:18,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:16:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:16:18,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 19:16:18,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:16:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:16:18,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:16:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:16:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760002957] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:16:18,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:16:18,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2023-04-01 19:16:18,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674279407] [2023-04-01 19:16:18,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:16:18,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:16:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:16:18,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:16:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:16:18,390 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:16:18,713 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2023-04-01 19:16:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 19:16:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 19:16:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:16:18,719 INFO L225 Difference]: With dead ends: 130 [2023-04-01 19:16:18,719 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 19:16:18,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 19:16:18,720 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:16:18,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 41 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:16:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 19:16:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2023-04-01 19:16:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-04-01 19:16:18,740 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2023-04-01 19:16:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:16:18,740 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-04-01 19:16:18,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-04-01 19:16:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 19:16:18,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:16:18,741 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:16:18,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 19:16:18,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 19:16:18,945 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:16:18,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:16:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1056304346, now seen corresponding path program 17 times [2023-04-01 19:16:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:16:18,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492824762] [2023-04-01 19:16:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:16:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:16:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:16:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:16:19,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:16:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492824762] [2023-04-01 19:16:19,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492824762] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:16:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869944268] [2023-04-01 19:16:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:16:19,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:16:19,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:16:19,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 19:16:19,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-01 19:16:19,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:16:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 19:16:19,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:16:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:16:19,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:16:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:16:19,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869944268] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:16:19,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:16:19,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2023-04-01 19:16:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59895969] [2023-04-01 19:16:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:16:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 19:16:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:16:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 19:16:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-04-01 19:16:19,523 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:16:19,728 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2023-04-01 19:16:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 19:16:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 19:16:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:16:19,729 INFO L225 Difference]: With dead ends: 66 [2023-04-01 19:16:19,729 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 19:16:19,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 91 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 19:16:19,729 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 178 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:16:19,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 53 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:16:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 19:16:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2023-04-01 19:16:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-04-01 19:16:19,744 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2023-04-01 19:16:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:16:19,744 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-04-01 19:16:19,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-04-01 19:16:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 19:16:19,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:16:19,744 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:16:19,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-04-01 19:16:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:19,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:16:19,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:16:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1814987016, now seen corresponding path program 18 times [2023-04-01 19:16:19,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:16:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185909717] [2023-04-01 19:16:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:16:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:16:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:21,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:16:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:16:21,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:16:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185909717] [2023-04-01 19:16:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185909717] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:16:21,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318351602] [2023-04-01 19:16:21,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:16:21,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:21,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:16:21,921 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:16:21,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-01 19:16:22,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-04-01 19:16:22,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:16:22,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 79 conjunts are in the unsatisfiable core [2023-04-01 19:16:22,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:16:24,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:16:24,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:16:24,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 155 [2023-04-01 19:16:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:16:25,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:16:33,768 INFO L321 Elim1Store]: treesize reduction 410, result has 37.4 percent of original size [2023-04-01 19:16:33,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 264 [2023-04-01 19:16:34,068 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2023-04-01 19:16:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 35 [2023-04-01 19:16:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:16:34,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318351602] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:16:34,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:16:34,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 37, 36] total 108 [2023-04-01 19:16:34,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513526184] [2023-04-01 19:16:34,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:16:34,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-04-01 19:16:34,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:16:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-04-01 19:16:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=10913, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 19:16:34,413 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 108 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 105 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:16:54,947 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2023-04-01 19:16:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-01 19:16:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 105 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 19:16:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:16:54,948 INFO L225 Difference]: With dead ends: 84 [2023-04-01 19:16:54,948 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 19:16:54,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1517, Invalid=23605, Unknown=0, NotChecked=0, Total=25122 [2023-04-01 19:16:54,951 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:16:54,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 256 Invalid, 3253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 19:16:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 19:16:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2023-04-01 19:16:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-04-01 19:16:54,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2023-04-01 19:16:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:16:54,978 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-04-01 19:16:54,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 105 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-04-01 19:16:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 19:16:54,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:16:54,979 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:16:54,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-01 19:16:55,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:55,185 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:16:55,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:16:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash 537985430, now seen corresponding path program 19 times [2023-04-01 19:16:55,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:16:55,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534819708] [2023-04-01 19:16:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:16:55,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:16:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:55,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:16:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:16:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:16:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534819708] [2023-04-01 19:16:55,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534819708] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:16:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359392203] [2023-04-01 19:16:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:16:55,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:16:55,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:16:55,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-01 19:16:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:55,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 19:16:55,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:16:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:16:55,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:16:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:16:55,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359392203] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:16:55,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:16:55,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2023-04-01 19:16:55,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800891330] [2023-04-01 19:16:55,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:16:55,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 19:16:55,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:16:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 19:16:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2023-04-01 19:16:55,816 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:16:56,061 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2023-04-01 19:16:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:16:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 19:16:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:16:56,064 INFO L225 Difference]: With dead ends: 122 [2023-04-01 19:16:56,064 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 19:16:56,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 97 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:16:56,069 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:16:56,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 62 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:16:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 19:16:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-04-01 19:16:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2023-04-01 19:16:56,092 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 60 [2023-04-01 19:16:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:16:56,092 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2023-04-01 19:16:56,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:56,093 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2023-04-01 19:16:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 19:16:56,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:16:56,093 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:16:56,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-04-01 19:16:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:56,301 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:16:56,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:16:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash 771806516, now seen corresponding path program 20 times [2023-04-01 19:16:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:16:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220501168] [2023-04-01 19:16:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:16:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:16:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:16:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:16:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:16:56,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220501168] [2023-04-01 19:16:56,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220501168] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:16:56,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825212898] [2023-04-01 19:16:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:16:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:16:56,518 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:16:56,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-01 19:16:56,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:16:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:16:56,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 19:16:56,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:16:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:16:56,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:16:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:16:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825212898] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:16:56,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:16:56,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2023-04-01 19:16:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229727220] [2023-04-01 19:16:56,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:16:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 19:16:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:16:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 19:16:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2023-04-01 19:16:56,837 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:16:57,082 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2023-04-01 19:16:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 19:16:57,084 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-01 19:16:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:16:57,084 INFO L225 Difference]: With dead ends: 90 [2023-04-01 19:16:57,084 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 19:16:57,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 100 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=436, Invalid=1204, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:16:57,085 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:16:57,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 69 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:16:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 19:16:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-04-01 19:16:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-04-01 19:16:57,112 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2023-04-01 19:16:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:16:57,112 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-04-01 19:16:57,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:16:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-04-01 19:16:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 19:16:57,113 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:16:57,113 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:16:57,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-04-01 19:16:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-01 19:16:57,318 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:16:57,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:16:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 533412114, now seen corresponding path program 21 times [2023-04-01 19:16:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:16:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934043660] [2023-04-01 19:16:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:16:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:16:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:00,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:17:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:17:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:17:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934043660] [2023-04-01 19:17:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934043660] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:17:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606386553] [2023-04-01 19:17:00,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:17:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:17:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:17:00,272 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:17:00,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-01 19:17:00,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-04-01 19:17:00,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:17:00,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 91 conjunts are in the unsatisfiable core [2023-04-01 19:17:00,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:17:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:05,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:05,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:17:05,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 105 [2023-04-01 19:17:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 11 proven. 156 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 19:17:06,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:17:22,123 INFO L321 Elim1Store]: treesize reduction 428, result has 51.2 percent of original size [2023-04-01 19:17:22,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 147 treesize of output 469 [2023-04-01 19:17:23,341 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-04-01 19:17:23,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 30 [2023-04-01 19:17:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 19:17:23,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606386553] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:17:23,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:17:23,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 43, 40] total 122 [2023-04-01 19:17:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205111089] [2023-04-01 19:17:23,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:17:23,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-04-01 19:17:23,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:17:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-04-01 19:17:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=14011, Unknown=1, NotChecked=0, Total=14762 [2023-04-01 19:17:23,711 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 122 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 119 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:17:42,405 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2023-04-01 19:17:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-04-01 19:17:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 119 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-01 19:17:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:17:42,407 INFO L225 Difference]: With dead ends: 93 [2023-04-01 19:17:42,407 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 19:17:42,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=1693, Invalid=30168, Unknown=1, NotChecked=0, Total=31862 [2023-04-01 19:17:42,412 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 4460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:17:42,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 311 Invalid, 4460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 19:17:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 19:17:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2023-04-01 19:17:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2023-04-01 19:17:42,439 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2023-04-01 19:17:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:17:42,442 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2023-04-01 19:17:42,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 119 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2023-04-01 19:17:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 19:17:42,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:17:42,443 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:17:42,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-01 19:17:42,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-01 19:17:42,648 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:17:42,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:17:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1803248336, now seen corresponding path program 22 times [2023-04-01 19:17:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:17:42,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915285960] [2023-04-01 19:17:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:17:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:17:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:17:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:17:42,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:17:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915285960] [2023-04-01 19:17:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915285960] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:17:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540053309] [2023-04-01 19:17:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:17:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:17:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:17:42,876 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:17:42,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-01 19:17:42,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:17:42,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:17:42,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 19:17:42,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:17:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:17:43,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:17:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:17:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540053309] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:17:43,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:17:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 41 [2023-04-01 19:17:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727460028] [2023-04-01 19:17:43,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:17:43,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:17:43,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:17:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:17:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:17:43,500 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:17:43,931 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2023-04-01 19:17:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-01 19:17:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-01 19:17:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:17:43,932 INFO L225 Difference]: With dead ends: 158 [2023-04-01 19:17:43,932 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 19:17:43,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 99 SyntacticMatches, 17 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=3011, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 19:17:43,936 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:17:43,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 71 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:17:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 19:17:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2023-04-01 19:17:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2023-04-01 19:17:43,960 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2023-04-01 19:17:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:17:43,960 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2023-04-01 19:17:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2023-04-01 19:17:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 19:17:43,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:17:43,961 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:17:43,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-04-01 19:17:44,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:17:44,163 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:17:44,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:17:44,163 INFO L85 PathProgramCache]: Analyzing trace with hash -802536818, now seen corresponding path program 23 times [2023-04-01 19:17:44,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:17:44,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652294831] [2023-04-01 19:17:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:17:44,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:17:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:17:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:17:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:17:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652294831] [2023-04-01 19:17:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652294831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:17:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533649204] [2023-04-01 19:17:44,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:17:44,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:17:44,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:17:44,422 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:17:44,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-01 19:17:44,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-04-01 19:17:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:17:44,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 19:17:44,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:17:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:17:44,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:17:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:17:44,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533649204] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:17:44,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:17:44,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2023-04-01 19:17:44,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624534099] [2023-04-01 19:17:44,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:17:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:17:44,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:17:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:17:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:17:44,840 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:17:45,089 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2023-04-01 19:17:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 19:17:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-01 19:17:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:17:45,090 INFO L225 Difference]: With dead ends: 78 [2023-04-01 19:17:45,090 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 19:17:45,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 109 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 19:17:45,091 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 264 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:17:45,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 65 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:17:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 19:17:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-04-01 19:17:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2023-04-01 19:17:45,114 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2023-04-01 19:17:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:17:45,115 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2023-04-01 19:17:45,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:17:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2023-04-01 19:17:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 19:17:45,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:17:45,115 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:17:45,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-04-01 19:17:45,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:17:45,321 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:17:45,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:17:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1454950484, now seen corresponding path program 24 times [2023-04-01 19:17:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:17:45,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62672444] [2023-04-01 19:17:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:17:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:17:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:48,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:17:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:17:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:17:48,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:17:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62672444] [2023-04-01 19:17:48,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62672444] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:17:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25990711] [2023-04-01 19:17:48,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:17:48,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:17:48,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:17:48,419 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:17:48,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-04-01 19:17:48,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-04-01 19:17:48,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:17:48,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 95 conjunts are in the unsatisfiable core [2023-04-01 19:17:48,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:17:48,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:17:52,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:17:52,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:17:52,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 35 [2023-04-01 19:17:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 17 proven. 162 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:17:52,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:18:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 19:18:15,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25990711] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:18:15,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:18:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 45, 44] total 135 [2023-04-01 19:18:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429391254] [2023-04-01 19:18:15,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:18:15,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2023-04-01 19:18:15,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:18:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2023-04-01 19:18:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=17342, Unknown=0, NotChecked=0, Total=18090 [2023-04-01 19:18:15,929 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 132 states have internal predecessors, (161), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:18:30,971 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2023-04-01 19:18:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-04-01 19:18:30,972 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 132 states have internal predecessors, (161), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-01 19:18:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:18:30,973 INFO L225 Difference]: With dead ends: 99 [2023-04-01 19:18:30,973 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 19:18:30,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6948 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=1659, Invalid=36953, Unknown=0, NotChecked=0, Total=38612 [2023-04-01 19:18:30,975 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 5608 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 5645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 5608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:18:30,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 370 Invalid, 5645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 5608 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 19:18:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 19:18:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2023-04-01 19:18:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-04-01 19:18:31,026 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 70 [2023-04-01 19:18:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:18:31,026 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-04-01 19:18:31,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 132 states have internal predecessors, (161), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-04-01 19:18:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 19:18:31,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:18:31,027 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:18:31,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-04-01 19:18:31,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-01 19:18:31,232 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:18:31,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:18:31,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1359258294, now seen corresponding path program 25 times [2023-04-01 19:18:31,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:18:31,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487903482] [2023-04-01 19:18:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:18:31,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:18:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:31,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:18:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:18:31,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:18:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487903482] [2023-04-01 19:18:31,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487903482] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:18:31,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933190420] [2023-04-01 19:18:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:18:31,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:18:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:18:31,488 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:18:31,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-04-01 19:18:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:31,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 19:18:31,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:18:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:18:31,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:18:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:18:32,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933190420] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:18:32,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:18:32,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2023-04-01 19:18:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591199890] [2023-04-01 19:18:32,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:18:32,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 19:18:32,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:18:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 19:18:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:18:32,017 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:18:32,444 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2023-04-01 19:18:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 19:18:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-01 19:18:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:18:32,445 INFO L225 Difference]: With dead ends: 146 [2023-04-01 19:18:32,447 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 19:18:32,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 115 SyntacticMatches, 19 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=487, Invalid=1769, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 19:18:32,447 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:18:32,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 61 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:18:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 19:18:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-04-01 19:18:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-04-01 19:18:32,482 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 72 [2023-04-01 19:18:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:18:32,482 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-04-01 19:18:32,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-04-01 19:18:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 19:18:32,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:18:32,483 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:18:32,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-04-01 19:18:32,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-04-01 19:18:32,688 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:18:32,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:18:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2119912472, now seen corresponding path program 26 times [2023-04-01 19:18:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:18:32,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812258573] [2023-04-01 19:18:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:18:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:18:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:18:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 19:18:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:18:32,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812258573] [2023-04-01 19:18:32,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812258573] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:18:32,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476574991] [2023-04-01 19:18:32,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:18:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:18:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:18:32,958 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:18:32,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-04-01 19:18:33,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:18:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:18:33,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 19:18:33,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:18:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 19:18:33,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:18:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 19:18:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476574991] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:18:33,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:18:33,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2023-04-01 19:18:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67317977] [2023-04-01 19:18:33,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:18:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 19:18:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:18:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 19:18:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=969, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:18:33,434 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:18:33,776 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2023-04-01 19:18:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 19:18:33,776 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 19:18:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:18:33,777 INFO L225 Difference]: With dead ends: 106 [2023-04-01 19:18:33,777 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 19:18:33,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 118 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 19:18:33,778 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:18:33,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 79 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:18:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 19:18:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-04-01 19:18:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2023-04-01 19:18:33,807 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2023-04-01 19:18:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:18:33,807 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2023-04-01 19:18:33,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:18:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2023-04-01 19:18:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 19:18:33,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:18:33,807 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:18:33,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-04-01 19:18:34,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-04-01 19:18:34,014 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:18:34,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:18:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash -843572538, now seen corresponding path program 27 times [2023-04-01 19:18:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:18:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437325534] [2023-04-01 19:18:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:18:34,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:18:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:38,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:18:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:18:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 25 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:18:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:18:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437325534] [2023-04-01 19:18:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437325534] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:18:38,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198484527] [2023-04-01 19:18:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:18:38,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:18:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:18:38,527 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:18:38,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-04-01 19:18:38,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-01 19:18:38,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:18:38,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 117 conjunts are in the unsatisfiable core [2023-04-01 19:18:38,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:18:39,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:18:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:18:43,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:18:43,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 155 [2023-04-01 19:18:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:18:44,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:19:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 19:19:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198484527] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:19:12,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:19:12,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 48] total 154 [2023-04-01 19:19:12,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372608189] [2023-04-01 19:19:12,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:19:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2023-04-01 19:19:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:19:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2023-04-01 19:19:12,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1706, Invalid=21856, Unknown=0, NotChecked=0, Total=23562 [2023-04-01 19:19:12,040 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 154 states, 154 states have (on average 1.1883116883116882) internal successors, (183), 151 states have internal predecessors, (183), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)