/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/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:20:04,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:20:04,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:20:04,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:20:04,243 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 [2023-03-31 00:20:04,280 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:20:04,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:20:04,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:20:04,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:20:04,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:20:04,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:20:04,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:20:04,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:20:04,283 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:20:04,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:20:04,284 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:20:04,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:20:04,285 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:20:04,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:20:04,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:20:04,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:20:04,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:20:04,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:20:04,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:20:04,286 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:20:04,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:20:04,287 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:20:04,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:20:04,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:20:04,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:20:04,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:20:04,558 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:20:04,558 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:20:04,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-03-31 00:20:05,793 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:20:05,976 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:20:05,976 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-03-31 00:20:05,981 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a71a8a4f2/bf8a958b95754be4ab83dc9074078fb0/FLAG66dca0fcf [2023-03-31 00:20:05,994 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a71a8a4f2/bf8a958b95754be4ab83dc9074078fb0 [2023-03-31 00:20:05,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:20:05,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:20:05,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:20:05,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:20:06,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:20:06,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:20:05" (1/1) ... [2023-03-31 00:20:06,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41aa46d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06, skipping insertion in model container [2023-03-31 00:20:06,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:20:05" (1/1) ... [2023-03-31 00:20:06,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:20:06,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:20:06,136 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/loop-invgen/fragtest_simple.i[893,906] [2023-03-31 00:20:06,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:20:06,156 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:20:06,167 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/loop-invgen/fragtest_simple.i[893,906] [2023-03-31 00:20:06,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:20:06,184 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:20:06,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06 WrapperNode [2023-03-31 00:20:06,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:20:06,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:20:06,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:20:06,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:20:06,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:20:06,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:20:06,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:20:06,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:20:06,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (1/1) ... [2023-03-31 00:20:06,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:20:06,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:06,243 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) [2023-03-31 00:20:06,247 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 [2023-03-31 00:20:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:20:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:20:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:20:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:20:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:20:06,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:20:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:20:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:20:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:20:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:20:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:20:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:20:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:20:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:20:06,341 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:20:06,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:20:06,474 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:20:06,480 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:20:06,480 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 00:20:06,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:20:06 BoogieIcfgContainer [2023-03-31 00:20:06,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:20:06,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:20:06,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:20:06,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:20:06,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:20:05" (1/3) ... [2023-03-31 00:20:06,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db6c9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:20:06, skipping insertion in model container [2023-03-31 00:20:06,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:20:06" (2/3) ... [2023-03-31 00:20:06,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db6c9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:20:06, skipping insertion in model container [2023-03-31 00:20:06,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:20:06" (3/3) ... [2023-03-31 00:20:06,512 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2023-03-31 00:20:06,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:20:06,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:20:06,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:20:06,641 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;@1f0541dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:20:06,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:20:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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) [2023-03-31 00:20:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 00:20:06,655 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:06,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:06,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:06,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1613859161, now seen corresponding path program 1 times [2023-03-31 00:20:06,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:06,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531387756] [2023-03-31 00:20:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531387756] [2023-03-31 00:20:06,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531387756] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:20:06,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:20:06,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:20:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046618083] [2023-03-31 00:20:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:20:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:20:06,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:20:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:20:06,959 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2023-03-31 00:20:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:07,072 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-03-31 00:20:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:20:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 [2023-03-31 00:20:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:07,080 INFO L225 Difference]: With dead ends: 48 [2023-03-31 00:20:07,080 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 00:20:07,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:20:07,088 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:07,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:07,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 00:20:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 00:20:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:20:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-03-31 00:20:07,140 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2023-03-31 00:20:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:07,140 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-03-31 00:20:07,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2023-03-31 00:20:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-03-31 00:20:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:20:07,174 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:07,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:07,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:20:07,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:07,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 20877373, now seen corresponding path program 1 times [2023-03-31 00:20:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009583502] [2023-03-31 00:20:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:07,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:07,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009583502] [2023-03-31 00:20:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009583502] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:20:07,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:20:07,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:20:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977326309] [2023-03-31 00:20:07,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:20:07,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:20:07,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:20:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:20:07,431 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) 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) [2023-03-31 00:20:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:07,560 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-03-31 00:20:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:20:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) 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 [2023-03-31 00:20:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:07,562 INFO L225 Difference]: With dead ends: 32 [2023-03-31 00:20:07,562 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 00:20:07,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:20:07,564 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:07,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 00:20:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-03-31 00:20:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:20:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-03-31 00:20:07,572 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2023-03-31 00:20:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:07,573 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-03-31 00:20:07,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) 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) [2023-03-31 00:20:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-03-31 00:20:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:20:07,574 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:07,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:07,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:20:07,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:07,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash -295388463, now seen corresponding path program 1 times [2023-03-31 00:20:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:07,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540686256] [2023-03-31 00:20:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-03-31 00:20:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:07,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540686256] [2023-03-31 00:20:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540686256] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:20:07,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:20:07,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:20:07,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253699860] [2023-03-31 00:20:07,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:20:07,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:20:07,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:20:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:20:07,713 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:20:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:07,833 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-03-31 00:20:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:20:07,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-03-31 00:20:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:07,837 INFO L225 Difference]: With dead ends: 50 [2023-03-31 00:20:07,837 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:20:07,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:20:07,845 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:07,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:20:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-03-31 00:20:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:20:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-03-31 00:20:07,862 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2023-03-31 00:20:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:07,862 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-03-31 00:20:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:20:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-03-31 00:20:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:20:07,864 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:07,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:07,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 00:20:07,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:07,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash 667739990, now seen corresponding path program 1 times [2023-03-31 00:20:07,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:07,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070127096] [2023-03-31 00:20:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:07,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-03-31 00:20:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070127096] [2023-03-31 00:20:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070127096] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152661842] [2023-03-31 00:20:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:07,997 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) [2023-03-31 00:20:08,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:20:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:08,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 00:20:08,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:08,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:20:08,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152661842] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:08,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2023-03-31 00:20:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197925295] [2023-03-31 00:20:08,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:08,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:20:08,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:20:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:20:08,275 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:20:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:08,527 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2023-03-31 00:20:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:20:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2023-03-31 00:20:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:08,529 INFO L225 Difference]: With dead ends: 65 [2023-03-31 00:20:08,529 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 00:20:08,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-03-31 00:20:08,530 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:08,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 00:20:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2023-03-31 00:20:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:20:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-03-31 00:20:08,538 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 28 [2023-03-31 00:20:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:08,538 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-03-31 00:20:08,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:20:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-03-31 00:20:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 00:20:08,540 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:08,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:08,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 00:20:08,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:08,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:08,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1538460881, now seen corresponding path program 2 times [2023-03-31 00:20:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:08,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041354827] [2023-03-31 00:20:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:08,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-03-31 00:20:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:08,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-03-31 00:20:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:20:08,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:08,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041354827] [2023-03-31 00:20:08,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041354827] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:08,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511908079] [2023-03-31 00:20:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:20:08,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:08,912 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) [2023-03-31 00:20:08,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:20:08,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:20:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:08,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 00:20:08,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:20:09,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:20:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511908079] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:09,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2023-03-31 00:20:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333885956] [2023-03-31 00:20:09,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:20:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:20:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:20:09,111 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:20:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:09,273 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2023-03-31 00:20:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:20:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-03-31 00:20:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:09,275 INFO L225 Difference]: With dead ends: 74 [2023-03-31 00:20:09,275 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 00:20:09,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:20:09,276 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:09,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 27 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 00:20:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-03-31 00:20:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:20:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-03-31 00:20:09,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 38 [2023-03-31 00:20:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:09,285 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-03-31 00:20:09,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:20:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-03-31 00:20:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 00:20:09,286 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:09,286 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:09,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:09,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:09,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:09,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1894088756, now seen corresponding path program 3 times [2023-03-31 00:20:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992764757] [2023-03-31 00:20:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:09,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-31 00:20:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:09,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-31 00:20:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:20:09,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:09,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992764757] [2023-03-31 00:20:09,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992764757] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:09,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572613043] [2023-03-31 00:20:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:20:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:09,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:09,631 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) [2023-03-31 00:20:09,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:20:09,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 00:20:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:09,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 00:20:09,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:20:09,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:20:09,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572613043] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:09,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:09,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2023-03-31 00:20:09,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274790495] [2023-03-31 00:20:09,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:09,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 00:20:09,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 00:20:09,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:20:09,825 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:20:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:10,007 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-03-31 00:20:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:20:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-03-31 00:20:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:10,012 INFO L225 Difference]: With dead ends: 62 [2023-03-31 00:20:10,012 INFO L226 Difference]: Without dead ends: 60 [2023-03-31 00:20:10,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2023-03-31 00:20:10,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:10,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 27 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-03-31 00:20:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-03-31 00:20:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:20:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-03-31 00:20:10,033 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 40 [2023-03-31 00:20:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:10,033 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-03-31 00:20:10,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:20:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-03-31 00:20:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 00:20:10,036 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:10,036 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:10,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:10,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:10,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:10,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash 354366300, now seen corresponding path program 4 times [2023-03-31 00:20:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:10,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712794614] [2023-03-31 00:20:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:10,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:10,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-31 00:20:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:10,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-31 00:20:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:10,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 00:20:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:20:10,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712794614] [2023-03-31 00:20:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712794614] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995543586] [2023-03-31 00:20:10,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:20:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:10,389 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) [2023-03-31 00:20:10,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:20:10,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:20:10,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:10,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 00:20:10,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:20:10,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:20:10,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995543586] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:10,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:10,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2023-03-31 00:20:10,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764587718] [2023-03-31 00:20:10,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 00:20:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 00:20:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-03-31 00:20:10,708 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 00:20:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:11,087 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2023-03-31 00:20:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 00:20:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 56 [2023-03-31 00:20:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:11,089 INFO L225 Difference]: With dead ends: 125 [2023-03-31 00:20:11,089 INFO L226 Difference]: Without dead ends: 79 [2023-03-31 00:20:11,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 00:20:11,090 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 131 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:11,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 47 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-31 00:20:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2023-03-31 00:20:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:20:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-03-31 00:20:11,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 56 [2023-03-31 00:20:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:11,099 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-03-31 00:20:11,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 00:20:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-03-31 00:20:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 00:20:11,100 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:11,100 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:11,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:11,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:11,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:11,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash -693157466, now seen corresponding path program 5 times [2023-03-31 00:20:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:11,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854153784] [2023-03-31 00:20:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:11,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:11,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:11,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-03-31 00:20:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:11,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-31 00:20:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:11,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-31 00:20:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:20:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854153784] [2023-03-31 00:20:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854153784] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220870087] [2023-03-31 00:20:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:20:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:11,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:11,496 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) [2023-03-31 00:20:11,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:20:11,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-03-31 00:20:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:11,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 00:20:11,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:20:11,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:20:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220870087] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:11,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2023-03-31 00:20:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605709273] [2023-03-31 00:20:11,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:11,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 00:20:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 00:20:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-03-31 00:20:11,721 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:20:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:11,945 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2023-03-31 00:20:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:20:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 60 [2023-03-31 00:20:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:11,946 INFO L225 Difference]: With dead ends: 78 [2023-03-31 00:20:11,946 INFO L226 Difference]: Without dead ends: 76 [2023-03-31 00:20:11,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:20:11,947 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:11,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:20:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-03-31 00:20:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2023-03-31 00:20:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:20:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2023-03-31 00:20:11,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 60 [2023-03-31 00:20:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:11,957 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2023-03-31 00:20:11,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:20:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2023-03-31 00:20:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-03-31 00:20:11,958 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:11,958 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:11,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 00:20:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:12,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:12,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -991178546, now seen corresponding path program 6 times [2023-03-31 00:20:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:12,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119074936] [2023-03-31 00:20:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-03-31 00:20:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-31 00:20:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-31 00:20:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 69 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:20:12,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119074936] [2023-03-31 00:20:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119074936] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:12,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391699145] [2023-03-31 00:20:12,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:20:12,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:12,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:12,375 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) [2023-03-31 00:20:12,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:20:12,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-03-31 00:20:12,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:12,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 00:20:12,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:20:12,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:20:12,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391699145] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:12,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:12,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2023-03-31 00:20:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746431905] [2023-03-31 00:20:12,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 00:20:12,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 00:20:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:20:12,818 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 00:20:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:13,308 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2023-03-31 00:20:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-03-31 00:20:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 76 [2023-03-31 00:20:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:13,310 INFO L225 Difference]: With dead ends: 165 [2023-03-31 00:20:13,310 INFO L226 Difference]: Without dead ends: 103 [2023-03-31 00:20:13,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=1643, Unknown=0, NotChecked=0, Total=2162 [2023-03-31 00:20:13,312 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 155 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:13,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 47 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-03-31 00:20:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2023-03-31 00:20:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:20:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2023-03-31 00:20:13,320 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 76 [2023-03-31 00:20:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:13,321 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2023-03-31 00:20:13,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 00:20:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2023-03-31 00:20:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 00:20:13,322 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:13,322 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:13,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:13,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:13,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:13,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 538957336, now seen corresponding path program 7 times [2023-03-31 00:20:13,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:13,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683441158] [2023-03-31 00:20:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:13,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-31 00:20:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 00:20:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 54 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:20:13,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683441158] [2023-03-31 00:20:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683441158] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971023339] [2023-03-31 00:20:13,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 00:20:13,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:13,768 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) [2023-03-31 00:20:13,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:20:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:13,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:20:13,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:20:13,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 68 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:20:14,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971023339] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:14,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:14,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 17 [2023-03-31 00:20:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151844328] [2023-03-31 00:20:14,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:20:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:20:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:20:14,034 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 14 states have internal predecessors, (71), 9 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:20:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:14,308 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2023-03-31 00:20:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:20:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 14 states have internal predecessors, (71), 9 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 80 [2023-03-31 00:20:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:14,310 INFO L225 Difference]: With dead ends: 94 [2023-03-31 00:20:14,310 INFO L226 Difference]: Without dead ends: 92 [2023-03-31 00:20:14,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2023-03-31 00:20:14,311 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:14,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 37 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-03-31 00:20:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2023-03-31 00:20:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 00:20:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2023-03-31 00:20:14,321 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 80 [2023-03-31 00:20:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:14,321 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2023-03-31 00:20:14,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 14 states have internal predecessors, (71), 9 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:20:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2023-03-31 00:20:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-03-31 00:20:14,322 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:14,323 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:14,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:14,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:14,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:14,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1314472256, now seen corresponding path program 8 times [2023-03-31 00:20:14,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664787465] [2023-03-31 00:20:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-03-31 00:20:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 00:20:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 123 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664787465] [2023-03-31 00:20:14,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664787465] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878677707] [2023-03-31 00:20:14,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:20:14,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:14,836 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) [2023-03-31 00:20:14,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:20:14,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:20:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:14,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 00:20:14,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 168 proven. 56 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-03-31 00:20:15,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 142 proven. 56 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 00:20:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878677707] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:15,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 30 [2023-03-31 00:20:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306276460] [2023-03-31 00:20:15,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:15,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-31 00:20:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-31 00:20:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2023-03-31 00:20:15,347 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 states have internal predecessors, (89), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-03-31 00:20:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:15,796 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2023-03-31 00:20:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 00:20:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 states have internal predecessors, (89), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 96 [2023-03-31 00:20:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:15,797 INFO L225 Difference]: With dead ends: 166 [2023-03-31 00:20:15,797 INFO L226 Difference]: Without dead ends: 121 [2023-03-31 00:20:15,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 194 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=1597, Unknown=0, NotChecked=0, Total=2070 [2023-03-31 00:20:15,799 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:15,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 47 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-03-31 00:20:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2023-03-31 00:20:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 00:20:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-03-31 00:20:15,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 96 [2023-03-31 00:20:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:15,808 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-03-31 00:20:15,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 states have internal predecessors, (89), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-03-31 00:20:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-03-31 00:20:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 00:20:15,809 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:15,809 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:15,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:16,009 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,SelfDestructingSolverStorable10 [2023-03-31 00:20:16,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:16,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash 574918149, now seen corresponding path program 9 times [2023-03-31 00:20:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:16,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567935780] [2023-03-31 00:20:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:16,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-31 00:20:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 00:20:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-31 00:20:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-31 00:20:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-03-31 00:20:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-03-31 00:20:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-03-31 00:20:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-03-31 00:20:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 123 proven. 93 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:16,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:16,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567935780] [2023-03-31 00:20:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567935780] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587921968] [2023-03-31 00:20:16,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:20:16,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:16,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:16,369 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) [2023-03-31 00:20:16,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:20:16,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-03-31 00:20:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:16,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:20:16,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 144 proven. 72 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:16,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 144 proven. 72 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:16,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587921968] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:16,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:16,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 32 [2023-03-31 00:20:16,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497566991] [2023-03-31 00:20:16,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-31 00:20:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-31 00:20:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2023-03-31 00:20:16,944 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 31 states have internal predecessors, (89), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 00:20:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:17,480 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2023-03-31 00:20:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-31 00:20:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 31 states have internal predecessors, (89), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 98 [2023-03-31 00:20:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:17,482 INFO L225 Difference]: With dead ends: 170 [2023-03-31 00:20:17,482 INFO L226 Difference]: Without dead ends: 127 [2023-03-31 00:20:17,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 196 SyntacticMatches, 16 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=1881, Unknown=0, NotChecked=0, Total=2450 [2023-03-31 00:20:17,484 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 202 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:17,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 37 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:20:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-03-31 00:20:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2023-03-31 00:20:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 00:20:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2023-03-31 00:20:17,492 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 98 [2023-03-31 00:20:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:17,493 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2023-03-31 00:20:17,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 31 states have internal predecessors, (89), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 00:20:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2023-03-31 00:20:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 00:20:17,494 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:17,494 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:17,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:17,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:17,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:17,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1466974838, now seen corresponding path program 10 times [2023-03-31 00:20:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:17,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730182208] [2023-03-31 00:20:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-31 00:20:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-31 00:20:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 88 proven. 146 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:17,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730182208] [2023-03-31 00:20:17,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730182208] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:17,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459446487] [2023-03-31 00:20:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:20:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:17,969 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) [2023-03-31 00:20:17,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:20:18,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:20:18,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:18,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 00:20:18,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 106 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:18,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 106 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:20:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459446487] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:18,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 19 [2023-03-31 00:20:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243033889] [2023-03-31 00:20:18,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-31 00:20:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-31 00:20:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-03-31 00:20:18,377 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 16 states have internal predecessors, (81), 11 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 00:20:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:18,659 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2023-03-31 00:20:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 00:20:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 16 states have internal predecessors, (81), 11 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 100 [2023-03-31 00:20:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:18,661 INFO L225 Difference]: With dead ends: 110 [2023-03-31 00:20:18,661 INFO L226 Difference]: Without dead ends: 108 [2023-03-31 00:20:18,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=848, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 00:20:18,662 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:18,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-03-31 00:20:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2023-03-31 00:20:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 00:20:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2023-03-31 00:20:18,668 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 100 [2023-03-31 00:20:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:18,669 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2023-03-31 00:20:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 16 states have internal predecessors, (81), 11 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 00:20:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2023-03-31 00:20:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-31 00:20:18,670 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:18,670 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:18,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:18,876 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,SelfDestructingSolverStorable12 [2023-03-31 00:20:18,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:18,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1270875314, now seen corresponding path program 11 times [2023-03-31 00:20:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858052177] [2023-03-31 00:20:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-31 00:20:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-31 00:20:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 193 proven. 117 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:20:19,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:19,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858052177] [2023-03-31 00:20:19,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858052177] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:19,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691409133] [2023-03-31 00:20:19,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:20:19,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:19,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:19,275 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) [2023-03-31 00:20:19,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 00:20:19,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-03-31 00:20:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:19,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 00:20:19,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 220 proven. 90 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:20:19,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 220 proven. 90 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:20:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691409133] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:19,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 39 [2023-03-31 00:20:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476425142] [2023-03-31 00:20:19,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:19,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-03-31 00:20:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-03-31 00:20:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 00:20:19,986 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 38 states have internal predecessors, (111), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 00:20:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:20,775 INFO L93 Difference]: Finished difference Result 245 states and 295 transitions. [2023-03-31 00:20:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 00:20:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 38 states have internal predecessors, (111), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 116 [2023-03-31 00:20:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:20,777 INFO L225 Difference]: With dead ends: 245 [2023-03-31 00:20:20,777 INFO L226 Difference]: Without dead ends: 151 [2023-03-31 00:20:20,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 233 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1163, Invalid=3807, Unknown=0, NotChecked=0, Total=4970 [2023-03-31 00:20:20,779 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 307 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:20,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 32 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 00:20:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-03-31 00:20:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 107. [2023-03-31 00:20:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 00:20:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2023-03-31 00:20:20,793 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 116 [2023-03-31 00:20:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:20,793 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2023-03-31 00:20:20,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 38 states have internal predecessors, (111), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 00:20:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2023-03-31 00:20:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-03-31 00:20:20,795 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:20,795 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:20,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:21,001 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,SelfDestructingSolverStorable13 [2023-03-31 00:20:21,002 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:21,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 706181116, now seen corresponding path program 12 times [2023-03-31 00:20:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:21,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361319515] [2023-03-31 00:20:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 00:20:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-31 00:20:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-31 00:20:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-31 00:20:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 130 proven. 222 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:20:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361319515] [2023-03-31 00:20:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361319515] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608089229] [2023-03-31 00:20:21,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:20:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:21,344 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) [2023-03-31 00:20:21,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 00:20:21,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-03-31 00:20:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:21,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-31 00:20:21,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 152 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:20:21,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 152 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:20:21,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608089229] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:21,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 21 [2023-03-31 00:20:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723031489] [2023-03-31 00:20:21,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:21,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 00:20:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 00:20:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-03-31 00:20:21,782 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 18 states have internal predecessors, (91), 13 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 00:20:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:22,121 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2023-03-31 00:20:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 00:20:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 18 states have internal predecessors, (91), 13 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 120 [2023-03-31 00:20:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:22,122 INFO L225 Difference]: With dead ends: 126 [2023-03-31 00:20:22,122 INFO L226 Difference]: Without dead ends: 124 [2023-03-31 00:20:22,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 249 SyntacticMatches, 20 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 00:20:22,123 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:22,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 47 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-03-31 00:20:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2023-03-31 00:20:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 00:20:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2023-03-31 00:20:22,136 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 120 [2023-03-31 00:20:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:22,136 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2023-03-31 00:20:22,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 18 states have internal predecessors, (91), 13 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 00:20:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2023-03-31 00:20:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-31 00:20:22,138 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:22,138 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:22,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:22,342 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,SelfDestructingSolverStorable14 [2023-03-31 00:20:22,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:22,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash 909679396, now seen corresponding path program 13 times [2023-03-31 00:20:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296033640] [2023-03-31 00:20:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 00:20:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-31 00:20:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-31 00:20:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-31 00:20:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-03-31 00:20:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-31 00:20:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 279 proven. 165 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:22,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:22,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296033640] [2023-03-31 00:20:22,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296033640] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:22,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831923822] [2023-03-31 00:20:22,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 00:20:22,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:22,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:22,810 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) [2023-03-31 00:20:22,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 00:20:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:22,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 00:20:22,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 352 proven. 132 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-03-31 00:20:23,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 310 proven. 132 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-03-31 00:20:23,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831923822] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:23,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:23,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 42 [2023-03-31 00:20:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978857610] [2023-03-31 00:20:23,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-31 00:20:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-31 00:20:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 00:20:23,568 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 41 states have internal predecessors, (121), 26 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-03-31 00:20:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:24,114 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2023-03-31 00:20:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-31 00:20:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 41 states have internal predecessors, (121), 26 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 136 [2023-03-31 00:20:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:24,116 INFO L225 Difference]: With dead ends: 230 [2023-03-31 00:20:24,116 INFO L226 Difference]: Without dead ends: 169 [2023-03-31 00:20:24,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 274 SyntacticMatches, 22 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=3323, Unknown=0, NotChecked=0, Total=4290 [2023-03-31 00:20:24,118 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 260 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:24,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 37 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:20:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-03-31 00:20:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 121. [2023-03-31 00:20:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 00:20:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2023-03-31 00:20:24,130 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 136 [2023-03-31 00:20:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:24,131 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2023-03-31 00:20:24,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 41 states have internal predecessors, (121), 26 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-03-31 00:20:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2023-03-31 00:20:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-03-31 00:20:24,133 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:24,133 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:24,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:24,339 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,SelfDestructingSolverStorable15 [2023-03-31 00:20:24,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:24,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1193869033, now seen corresponding path program 14 times [2023-03-31 00:20:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:24,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355454028] [2023-03-31 00:20:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 00:20:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-31 00:20:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-03-31 00:20:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-03-31 00:20:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-03-31 00:20:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-03-31 00:20:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-03-31 00:20:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-03-31 00:20:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-03-31 00:20:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-03-31 00:20:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-31 00:20:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-03-31 00:20:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 279 proven. 189 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:24,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:24,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355454028] [2023-03-31 00:20:24,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355454028] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:24,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735615839] [2023-03-31 00:20:24,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:20:24,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:24,870 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) [2023-03-31 00:20:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 00:20:24,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:20:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:24,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-31 00:20:24,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 312 proven. 156 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:25,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 312 proven. 156 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:25,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735615839] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:25,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:25,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 44 [2023-03-31 00:20:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469987577] [2023-03-31 00:20:25,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:25,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-03-31 00:20:25,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-03-31 00:20:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1467, Unknown=0, NotChecked=0, Total=1892 [2023-03-31 00:20:25,787 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 44 states, 44 states have (on average 2.75) internal successors, (121), 43 states have internal predecessors, (121), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-03-31 00:20:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:26,569 INFO L93 Difference]: Finished difference Result 234 states and 281 transitions. [2023-03-31 00:20:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-31 00:20:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 43 states have internal predecessors, (121), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 138 [2023-03-31 00:20:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:26,572 INFO L225 Difference]: With dead ends: 234 [2023-03-31 00:20:26,572 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 00:20:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 276 SyntacticMatches, 24 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 00:20:26,574 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 342 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:26,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 52 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 00:20:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 00:20:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 123. [2023-03-31 00:20:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 00:20:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2023-03-31 00:20:26,589 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 138 [2023-03-31 00:20:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:26,589 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2023-03-31 00:20:26,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 43 states have internal predecessors, (121), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-03-31 00:20:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2023-03-31 00:20:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 00:20:26,591 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:26,591 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:26,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:26,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:26,798 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:26,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash -577796754, now seen corresponding path program 15 times [2023-03-31 00:20:26,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:26,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043939113] [2023-03-31 00:20:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:26,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-31 00:20:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-03-31 00:20:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-31 00:20:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-31 00:20:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 180 proven. 314 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:27,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043939113] [2023-03-31 00:20:27,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043939113] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551069110] [2023-03-31 00:20:27,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:20:27,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:27,195 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) [2023-03-31 00:20:27,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-31 00:20:27,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-03-31 00:20:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:27,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 32 conjunts are in the unsatisfiable core [2023-03-31 00:20:27,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 206 proven. 288 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:27,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 206 proven. 288 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 00:20:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551069110] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:27,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:27,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 23 [2023-03-31 00:20:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718574808] [2023-03-31 00:20:27,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:27,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 00:20:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 00:20:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:20:27,680 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 20 states have internal predecessors, (101), 15 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 00:20:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:28,037 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2023-03-31 00:20:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 00:20:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 20 states have internal predecessors, (101), 15 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 140 [2023-03-31 00:20:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:28,039 INFO L225 Difference]: With dead ends: 142 [2023-03-31 00:20:28,039 INFO L226 Difference]: Without dead ends: 140 [2023-03-31 00:20:28,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 291 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1274, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 00:20:28,040 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:28,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 27 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-03-31 00:20:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2023-03-31 00:20:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 00:20:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2023-03-31 00:20:28,051 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 140 [2023-03-31 00:20:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:28,051 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2023-03-31 00:20:28,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 20 states have internal predecessors, (101), 15 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 00:20:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2023-03-31 00:20:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-03-31 00:20:28,053 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:28,053 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:28,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:28,259 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,SelfDestructingSolverStorable17 [2023-03-31 00:20:28,260 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:28,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:28,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2053405546, now seen corresponding path program 16 times [2023-03-31 00:20:28,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:28,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203682952] [2023-03-31 00:20:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:28,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-31 00:20:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-03-31 00:20:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-31 00:20:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-31 00:20:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-03-31 00:20:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-03-31 00:20:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 381 proven. 221 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 00:20:28,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:28,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203682952] [2023-03-31 00:20:28,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203682952] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:28,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106648954] [2023-03-31 00:20:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:20:28,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:28,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:28,837 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) [2023-03-31 00:20:28,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-31 00:20:28,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:20:28,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:28,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 00:20:28,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 420 proven. 182 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 00:20:29,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 420 proven. 182 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 00:20:29,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106648954] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:29,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:29,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 51 [2023-03-31 00:20:29,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886284285] [2023-03-31 00:20:29,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:29,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-03-31 00:20:29,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-03-31 00:20:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-03-31 00:20:29,847 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand has 51 states, 51 states have (on average 2.803921568627451) internal successors, (143), 50 states have internal predecessors, (143), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-03-31 00:20:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:30,983 INFO L93 Difference]: Finished difference Result 325 states and 393 transitions. [2023-03-31 00:20:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-03-31 00:20:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.803921568627451) internal successors, (143), 50 states have internal predecessors, (143), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 156 [2023-03-31 00:20:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:30,984 INFO L225 Difference]: With dead ends: 325 [2023-03-31 00:20:30,984 INFO L226 Difference]: Without dead ends: 199 [2023-03-31 00:20:30,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 313 SyntacticMatches, 25 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2063, Invalid=6867, Unknown=0, NotChecked=0, Total=8930 [2023-03-31 00:20:30,986 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 343 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:30,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 57 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:20:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-03-31 00:20:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 139. [2023-03-31 00:20:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 00:20:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2023-03-31 00:20:31,002 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 156 [2023-03-31 00:20:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:31,002 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2023-03-31 00:20:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.803921568627451) internal successors, (143), 50 states have internal predecessors, (143), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-03-31 00:20:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2023-03-31 00:20:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-31 00:20:31,003 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:31,004 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:31,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:31,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:31,205 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:31,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1701812768, now seen corresponding path program 17 times [2023-03-31 00:20:31,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:31,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461519812] [2023-03-31 00:20:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:31,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-31 00:20:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-31 00:20:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-31 00:20:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-03-31 00:20:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-31 00:20:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2023-03-31 00:20:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-03-31 00:20:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2023-03-31 00:20:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 238 proven. 422 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 00:20:31,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:31,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461519812] [2023-03-31 00:20:31,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461519812] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:31,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122917257] [2023-03-31 00:20:31,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:20:31,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:31,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:31,651 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) [2023-03-31 00:20:31,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-03-31 00:20:31,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-03-31 00:20:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:31,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-31 00:20:31,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 268 proven. 392 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 00:20:31,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 268 proven. 392 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 00:20:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122917257] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:32,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:32,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 25 [2023-03-31 00:20:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893678667] [2023-03-31 00:20:32,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:32,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 00:20:32,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 00:20:32,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2023-03-31 00:20:32,281 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 22 states have internal predecessors, (111), 17 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 00:20:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:32,663 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2023-03-31 00:20:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 00:20:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 22 states have internal predecessors, (111), 17 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 160 [2023-03-31 00:20:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:32,665 INFO L225 Difference]: With dead ends: 158 [2023-03-31 00:20:32,665 INFO L226 Difference]: Without dead ends: 156 [2023-03-31 00:20:32,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 333 SyntacticMatches, 28 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=1517, Unknown=0, NotChecked=0, Total=2070 [2023-03-31 00:20:32,667 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:32,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 37 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-03-31 00:20:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2023-03-31 00:20:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 00:20:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2023-03-31 00:20:32,680 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 160 [2023-03-31 00:20:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:32,680 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2023-03-31 00:20:32,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 22 states have internal predecessors, (111), 17 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 00:20:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2023-03-31 00:20:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-31 00:20:32,682 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:32,682 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:32,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:32,888 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:32,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash -796835576, now seen corresponding path program 18 times [2023-03-31 00:20:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890722751] [2023-03-31 00:20:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-03-31 00:20:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-31 00:20:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-31 00:20:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-31 00:20:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-03-31 00:20:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-31 00:20:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2023-03-31 00:20:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-03-31 00:20:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2023-03-31 00:20:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-31 00:20:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-03-31 00:20:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 499 proven. 285 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-03-31 00:20:33,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890722751] [2023-03-31 00:20:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890722751] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151928554] [2023-03-31 00:20:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:20:33,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:33,581 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) [2023-03-31 00:20:33,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-03-31 00:20:33,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-03-31 00:20:33,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:33,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-31 00:20:33,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 544 proven. 240 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-03-31 00:20:34,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 544 proven. 240 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-03-31 00:20:34,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151928554] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:34,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:34,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 57 [2023-03-31 00:20:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583396615] [2023-03-31 00:20:34,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-03-31 00:20:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-03-31 00:20:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=2466, Unknown=0, NotChecked=0, Total=3192 [2023-03-31 00:20:34,778 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 57 states, 57 states have (on average 2.789473684210526) internal successors, (159), 56 states have internal predecessors, (159), 36 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-03-31 00:20:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:36,048 INFO L93 Difference]: Finished difference Result 365 states and 442 transitions. [2023-03-31 00:20:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-03-31 00:20:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.789473684210526) internal successors, (159), 56 states have internal predecessors, (159), 36 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 176 [2023-03-31 00:20:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:36,050 INFO L225 Difference]: With dead ends: 365 [2023-03-31 00:20:36,050 INFO L226 Difference]: Without dead ends: 223 [2023-03-31 00:20:36,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 353 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3847 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2609, Invalid=8733, Unknown=0, NotChecked=0, Total=11342 [2023-03-31 00:20:36,053 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 409 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:36,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 37 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:20:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-03-31 00:20:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2023-03-31 00:20:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 00:20:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2023-03-31 00:20:36,069 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 176 [2023-03-31 00:20:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:36,069 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2023-03-31 00:20:36,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.789473684210526) internal successors, (159), 56 states have internal predecessors, (159), 36 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-03-31 00:20:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2023-03-31 00:20:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-03-31 00:20:36,071 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:36,071 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:36,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-03-31 00:20:36,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:36,277 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:36,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:36,277 INFO L85 PathProgramCache]: Analyzing trace with hash -143484590, now seen corresponding path program 19 times [2023-03-31 00:20:36,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:36,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39541784] [2023-03-31 00:20:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:36,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-03-31 00:20:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-31 00:20:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-31 00:20:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-03-31 00:20:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-03-31 00:20:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-03-31 00:20:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-03-31 00:20:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-03-31 00:20:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 304 proven. 546 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-03-31 00:20:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:36,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39541784] [2023-03-31 00:20:36,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39541784] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:36,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410621125] [2023-03-31 00:20:36,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 00:20:36,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:36,849 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) [2023-03-31 00:20:36,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-03-31 00:20:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:36,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 00:20:36,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 338 proven. 512 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-03-31 00:20:37,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 338 proven. 512 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-03-31 00:20:37,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410621125] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:37,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:37,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 27 [2023-03-31 00:20:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130303788] [2023-03-31 00:20:37,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:37,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 00:20:37,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 00:20:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:20:37,527 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand has 27 states, 27 states have (on average 4.481481481481482) internal successors, (121), 24 states have internal predecessors, (121), 19 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 00:20:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:37,978 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2023-03-31 00:20:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-31 00:20:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.481481481481482) internal successors, (121), 24 states have internal predecessors, (121), 19 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 180 [2023-03-31 00:20:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:37,982 INFO L225 Difference]: With dead ends: 174 [2023-03-31 00:20:37,982 INFO L226 Difference]: Without dead ends: 172 [2023-03-31 00:20:37,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 375 SyntacticMatches, 32 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=670, Invalid=1780, Unknown=0, NotChecked=0, Total=2450 [2023-03-31 00:20:37,983 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:37,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 47 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-03-31 00:20:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2023-03-31 00:20:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-31 00:20:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2023-03-31 00:20:37,998 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 180 [2023-03-31 00:20:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:37,999 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2023-03-31 00:20:37,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.481481481481482) internal successors, (121), 24 states have internal predecessors, (121), 19 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 00:20:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2023-03-31 00:20:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-03-31 00:20:38,000 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:38,000 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:38,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-03-31 00:20:38,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:38,207 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:38,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -331198342, now seen corresponding path program 20 times [2023-03-31 00:20:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274819849] [2023-03-31 00:20:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-03-31 00:20:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-03-31 00:20:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-31 00:20:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-31 00:20:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-03-31 00:20:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-03-31 00:20:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-03-31 00:20:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-03-31 00:20:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-03-31 00:20:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-03-31 00:20:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2023-03-31 00:20:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 633 proven. 357 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:39,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:39,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274819849] [2023-03-31 00:20:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274819849] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:39,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804182523] [2023-03-31 00:20:39,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:20:39,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:39,041 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) [2023-03-31 00:20:39,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-03-31 00:20:39,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:20:39,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:39,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2023-03-31 00:20:39,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 748 proven. 306 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2023-03-31 00:20:39,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 682 proven. 306 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-03-31 00:20:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804182523] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:40,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 60 [2023-03-31 00:20:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412421686] [2023-03-31 00:20:40,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-03-31 00:20:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-03-31 00:20:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2755, Unknown=0, NotChecked=0, Total=3540 [2023-03-31 00:20:40,352 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand has 60 states, 60 states have (on average 2.816666666666667) internal successors, (169), 59 states have internal predecessors, (169), 38 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2023-03-31 00:20:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:41,384 INFO L93 Difference]: Finished difference Result 326 states and 391 transitions. [2023-03-31 00:20:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-03-31 00:20:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.816666666666667) internal successors, (169), 59 states have internal predecessors, (169), 38 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 196 [2023-03-31 00:20:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:41,386 INFO L225 Difference]: With dead ends: 326 [2023-03-31 00:20:41,386 INFO L226 Difference]: Without dead ends: 241 [2023-03-31 00:20:41,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 394 SyntacticMatches, 34 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2038, Invalid=7082, Unknown=0, NotChecked=0, Total=9120 [2023-03-31 00:20:41,388 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 406 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:41,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 47 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:20:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-03-31 00:20:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 169. [2023-03-31 00:20:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-31 00:20:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2023-03-31 00:20:41,403 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 196 [2023-03-31 00:20:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:41,403 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2023-03-31 00:20:41,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.816666666666667) internal successors, (169), 59 states have internal predecessors, (169), 38 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2023-03-31 00:20:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2023-03-31 00:20:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-03-31 00:20:41,405 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:41,405 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:41,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:41,613 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,SelfDestructingSolverStorable22 [2023-03-31 00:20:41,613 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:41,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1858647743, now seen corresponding path program 21 times [2023-03-31 00:20:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136959647] [2023-03-31 00:20:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-03-31 00:20:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-03-31 00:20:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-03-31 00:20:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-03-31 00:20:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-03-31 00:20:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-03-31 00:20:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-03-31 00:20:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-03-31 00:20:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2023-03-31 00:20:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-03-31 00:20:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-31 00:20:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2023-03-31 00:20:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-03-31 00:20:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-03-31 00:20:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2023-03-31 00:20:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-03-31 00:20:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-03-31 00:20:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2023-03-31 00:20:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 633 proven. 393 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:42,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136959647] [2023-03-31 00:20:42,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136959647] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043037028] [2023-03-31 00:20:42,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:20:42,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:42,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:42,441 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) [2023-03-31 00:20:42,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-03-31 00:20:42,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-03-31 00:20:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:42,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 00:20:42,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 684 proven. 342 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:43,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 684 proven. 342 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:43,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043037028] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:43,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:43,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 62 [2023-03-31 00:20:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191601783] [2023-03-31 00:20:43,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-03-31 00:20:43,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-03-31 00:20:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=2937, Unknown=0, NotChecked=0, Total=3782 [2023-03-31 00:20:43,903 INFO L87 Difference]: Start difference. First operand 169 states and 180 transitions. Second operand has 62 states, 62 states have (on average 2.725806451612903) internal successors, (169), 61 states have internal predecessors, (169), 39 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-03-31 00:20:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:44,992 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2023-03-31 00:20:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-03-31 00:20:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.725806451612903) internal successors, (169), 61 states have internal predecessors, (169), 39 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 198 [2023-03-31 00:20:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:44,994 INFO L225 Difference]: With dead ends: 330 [2023-03-31 00:20:44,994 INFO L226 Difference]: Without dead ends: 247 [2023-03-31 00:20:44,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 396 SyntacticMatches, 36 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2234, Invalid=7666, Unknown=0, NotChecked=0, Total=9900 [2023-03-31 00:20:44,996 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 408 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:44,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 42 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:20:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-03-31 00:20:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 171. [2023-03-31 00:20:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 138 states have internal predecessors, (141), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-31 00:20:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 182 transitions. [2023-03-31 00:20:45,012 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 182 transitions. Word has length 198 [2023-03-31 00:20:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:45,013 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 182 transitions. [2023-03-31 00:20:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.725806451612903) internal successors, (169), 61 states have internal predecessors, (169), 39 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-03-31 00:20:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 182 transitions. [2023-03-31 00:20:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-03-31 00:20:45,014 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:45,014 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:45,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-03-31 00:20:45,221 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,SelfDestructingSolverStorable23 [2023-03-31 00:20:45,221 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:45,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1766760388, now seen corresponding path program 22 times [2023-03-31 00:20:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:45,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126463679] [2023-03-31 00:20:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-31 00:20:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-31 00:20:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-31 00:20:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-03-31 00:20:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-31 00:20:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2023-03-31 00:20:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-03-31 00:20:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2023-03-31 00:20:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-31 00:20:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-03-31 00:20:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-03-31 00:20:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2023-03-31 00:20:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2023-03-31 00:20:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 378 proven. 686 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:45,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:45,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126463679] [2023-03-31 00:20:45,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126463679] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:45,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85281228] [2023-03-31 00:20:45,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:20:45,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:45,809 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) [2023-03-31 00:20:45,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-03-31 00:20:45,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:20:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:45,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-31 00:20:45,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 416 proven. 648 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:46,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 416 proven. 648 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-03-31 00:20:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85281228] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:46,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:46,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 29 [2023-03-31 00:20:46,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611501024] [2023-03-31 00:20:46,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:46,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-03-31 00:20:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-03-31 00:20:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=543, Unknown=0, NotChecked=0, Total=812 [2023-03-31 00:20:46,521 INFO L87 Difference]: Start difference. First operand 171 states and 182 transitions. Second operand has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 26 states have internal predecessors, (131), 21 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-31 00:20:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:47,008 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2023-03-31 00:20:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-31 00:20:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 26 states have internal predecessors, (131), 21 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 200 [2023-03-31 00:20:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:47,010 INFO L225 Difference]: With dead ends: 190 [2023-03-31 00:20:47,010 INFO L226 Difference]: Without dead ends: 188 [2023-03-31 00:20:47,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 417 SyntacticMatches, 36 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=799, Invalid=2063, Unknown=0, NotChecked=0, Total=2862 [2023-03-31 00:20:47,011 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 99 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:47,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 47 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:20:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-03-31 00:20:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2023-03-31 00:20:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 00:20:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 195 transitions. [2023-03-31 00:20:47,027 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 195 transitions. Word has length 200 [2023-03-31 00:20:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:47,027 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 195 transitions. [2023-03-31 00:20:47,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 26 states have internal predecessors, (131), 21 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-03-31 00:20:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 195 transitions. [2023-03-31 00:20:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-03-31 00:20:47,029 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:47,029 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:47,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:47,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:47,235 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:47,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash 217527020, now seen corresponding path program 23 times [2023-03-31 00:20:47,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:47,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952107094] [2023-03-31 00:20:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 00:20:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-03-31 00:20:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-03-31 00:20:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-03-31 00:20:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-03-31 00:20:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-31 00:20:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-03-31 00:20:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-31 00:20:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-03-31 00:20:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-31 00:20:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2023-03-31 00:20:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-03-31 00:20:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2023-03-31 00:20:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-31 00:20:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-03-31 00:20:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-03-31 00:20:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2023-03-31 00:20:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2023-03-31 00:20:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2023-03-31 00:20:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-03-31 00:20:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 783 proven. 437 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-03-31 00:20:48,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:48,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952107094] [2023-03-31 00:20:48,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952107094] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:48,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389033106] [2023-03-31 00:20:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:20:48,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:48,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:48,197 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) [2023-03-31 00:20:48,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-03-31 00:20:48,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-03-31 00:20:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:48,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 43 conjunts are in the unsatisfiable core [2023-03-31 00:20:48,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 840 proven. 380 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-03-31 00:20:49,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 840 proven. 380 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-03-31 00:20:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389033106] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:49,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:49,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 69 [2023-03-31 00:20:49,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11821844] [2023-03-31 00:20:49,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-03-31 00:20:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-03-31 00:20:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1062, Invalid=3630, Unknown=0, NotChecked=0, Total=4692 [2023-03-31 00:20:49,789 INFO L87 Difference]: Start difference. First operand 183 states and 195 transitions. Second operand has 69 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 68 states have internal predecessors, (191), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 00:20:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:51,557 INFO L93 Difference]: Finished difference Result 445 states and 540 transitions. [2023-03-31 00:20:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-03-31 00:20:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 68 states have internal predecessors, (191), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 216 [2023-03-31 00:20:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:51,559 INFO L225 Difference]: With dead ends: 445 [2023-03-31 00:20:51,559 INFO L226 Difference]: Without dead ends: 271 [2023-03-31 00:20:51,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 433 SyntacticMatches, 37 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3893, Invalid=13137, Unknown=0, NotChecked=0, Total=17030 [2023-03-31 00:20:51,562 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 541 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:51,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 37 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 00:20:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-03-31 00:20:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 187. [2023-03-31 00:20:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 151 states have internal predecessors, (154), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 00:20:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 199 transitions. [2023-03-31 00:20:51,581 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 199 transitions. Word has length 216 [2023-03-31 00:20:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:51,582 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 199 transitions. [2023-03-31 00:20:51,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 68 states have internal predecessors, (191), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 00:20:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 199 transitions. [2023-03-31 00:20:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-03-31 00:20:51,583 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:51,583 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:51,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-03-31 00:20:51,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:51,790 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:51,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1677523254, now seen corresponding path program 24 times [2023-03-31 00:20:51,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:51,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132702424] [2023-03-31 00:20:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:51,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-03-31 00:20:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-31 00:20:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-31 00:20:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-03-31 00:20:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-03-31 00:20:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-03-31 00:20:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-03-31 00:20:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-03-31 00:20:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-03-31 00:20:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2023-03-31 00:20:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-03-31 00:20:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2023-03-31 00:20:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-31 00:20:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 460 proven. 842 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-03-31 00:20:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:52,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132702424] [2023-03-31 00:20:52,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132702424] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:52,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403275290] [2023-03-31 00:20:52,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 00:20:52,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:52,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:52,505 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) [2023-03-31 00:20:52,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-03-31 00:20:52,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-03-31 00:20:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:20:52,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 00:20:52,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 502 proven. 800 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-03-31 00:20:52,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 502 proven. 800 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-03-31 00:20:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403275290] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:53,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:53,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 31 [2023-03-31 00:20:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174242466] [2023-03-31 00:20:53,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-31 00:20:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-31 00:20:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2023-03-31 00:20:53,309 INFO L87 Difference]: Start difference. First operand 187 states and 199 transitions. Second operand has 31 states, 31 states have (on average 4.548387096774194) internal successors, (141), 28 states have internal predecessors, (141), 23 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 00:20:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:53,849 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2023-03-31 00:20:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-31 00:20:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.548387096774194) internal successors, (141), 28 states have internal predecessors, (141), 23 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 220 [2023-03-31 00:20:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:53,851 INFO L225 Difference]: With dead ends: 206 [2023-03-31 00:20:53,851 INFO L226 Difference]: Without dead ends: 204 [2023-03-31 00:20:53,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 459 SyntacticMatches, 40 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=940, Invalid=2366, Unknown=0, NotChecked=0, Total=3306 [2023-03-31 00:20:53,852 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 103 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:53,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 52 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:20:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-03-31 00:20:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2023-03-31 00:20:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 160 states have internal predecessors, (163), 25 states have call successors, (25), 15 states have call predecessors, (25), 14 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-31 00:20:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2023-03-31 00:20:53,871 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 220 [2023-03-31 00:20:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:53,871 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2023-03-31 00:20:53,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.548387096774194) internal successors, (141), 28 states have internal predecessors, (141), 23 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 00:20:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2023-03-31 00:20:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-03-31 00:20:53,873 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:53,873 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:53,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:54,079 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,SelfDestructingSolverStorable26 [2023-03-31 00:20:54,079 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:54,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -445093794, now seen corresponding path program 25 times [2023-03-31 00:20:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:54,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186492853] [2023-03-31 00:20:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:20:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-03-31 00:20:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-03-31 00:20:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-03-31 00:20:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-31 00:20:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-03-31 00:20:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-03-31 00:20:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-03-31 00:20:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-03-31 00:20:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-31 00:20:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-31 00:20:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-03-31 00:20:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-03-31 00:20:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-03-31 00:20:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-03-31 00:20:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-03-31 00:20:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-03-31 00:20:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2023-03-31 00:20:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-03-31 00:20:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2023-03-31 00:20:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-31 00:20:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2023-03-31 00:20:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2023-03-31 00:20:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 949 proven. 525 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-03-31 00:20:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:20:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186492853] [2023-03-31 00:20:55,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186492853] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:20:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631084757] [2023-03-31 00:20:55,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 00:20:55,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:20:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:20:55,204 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) [2023-03-31 00:20:55,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-03-31 00:20:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:20:55,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-31 00:20:55,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:20:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 1092 proven. 462 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2023-03-31 00:20:56,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:20:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 1010 proven. 462 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2023-03-31 00:20:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631084757] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:20:56,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:20:56,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 72 [2023-03-31 00:20:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958685028] [2023-03-31 00:20:56,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:20:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-03-31 00:20:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:20:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-03-31 00:20:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=3979, Unknown=0, NotChecked=0, Total=5112 [2023-03-31 00:20:56,904 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand has 72 states, 72 states have (on average 2.7916666666666665) internal successors, (201), 71 states have internal predecessors, (201), 46 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) [2023-03-31 00:20:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:20:58,116 INFO L93 Difference]: Finished difference Result 390 states and 469 transitions. [2023-03-31 00:20:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-03-31 00:20:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.7916666666666665) internal successors, (201), 71 states have internal predecessors, (201), 46 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) Word has length 236 [2023-03-31 00:20:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:20:58,118 INFO L225 Difference]: With dead ends: 390 [2023-03-31 00:20:58,118 INFO L226 Difference]: Without dead ends: 289 [2023-03-31 00:20:58,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 474 SyntacticMatches, 42 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4866 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2972, Invalid=10368, Unknown=0, NotChecked=0, Total=13340 [2023-03-31 00:20:58,121 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 526 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 00:20:58,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 42 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 00:20:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-03-31 00:20:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 201. [2023-03-31 00:20:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 162 states have internal predecessors, (165), 25 states have call successors, (25), 15 states have call predecessors, (25), 14 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-03-31 00:20:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 214 transitions. [2023-03-31 00:20:58,149 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 214 transitions. Word has length 236 [2023-03-31 00:20:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:20:58,150 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 214 transitions. [2023-03-31 00:20:58,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.7916666666666665) internal successors, (201), 71 states have internal predecessors, (201), 46 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) [2023-03-31 00:20:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 214 transitions. [2023-03-31 00:20:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-03-31 00:20:58,151 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:20:58,151 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:20:58,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-03-31 00:20:58,357 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,SelfDestructingSolverStorable27 [2023-03-31 00:20:58,357 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:20:58,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:20:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1572051549, now seen corresponding path program 26 times [2023-03-31 00:20:58,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:20:58,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37433025] [2023-03-31 00:20:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:20:58,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:20:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat